VB.Net - Visual Basic Interview Questions & Answers

Formatting Decimals In Visual Basic

2009-06-24T19:55:00.000-07:00

got a project from my programming book, which using for this subject.
now, when i put in the dollar amount, and click calculate, it does not show
the orrigional prices in a decimal format.
so put in a variable called Dim decOriginalPrice as decimal = 0
and then in my code, did put in to show the format, such as
tbOrigionalPriceTextBox.Text = decOrigionalPrice.ToString("C")
for the decimal passing, but it still just shows up as say for example
125.55 instead of $125.00, but my discounted price amount and the total
price is in dollars and cents.
so my question is:

is there some code to format the amount to dollars and cents?
for the Origional Price.
did put those variables and code in, but did not work so took them out.
any ideas how i can fix this one?
the application is to enter a price, enter the description for to recover
callateral from a debt collector.
wen you click the calculate button, it sets focus on the origional price
text box, then it then shows the origional price, then in a group box and
read only boxes, the discount which is 10% and formatted to the dollars and
cents, then the total price of the discounted goods in dollars and cents
format.
will paste the code below.
if any one can help me how to fix this strange and queer oddity or some
thing i am missing, as rebuilding my projects from 2008 to 2005.
cheers Marvin.

'Program: Discount
'Programmer: Marvin Hunkin
'Date: Tuesday September 23 2008
'Description: Calculate Discount Amounts For Lennie's Baol Bonds
' Then display the discounted amount, the description, and total amount of
discount at 10% for the total cost of the item being held

Public Class frmDiscount

Private Sub btnCalculateButton_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles btnCalculateButton.Click

Dim constDiscountRate As Decimal = 0.1
Dim decDiscountAmount As Decimal = 0
Dim decDiscountedPrice As Decimal = 0

If IsNumeric(tbOriginalPriceTextBox.Text) Then
decDiscountAmount = CDec(tbOriginalPriceTextBox.Text) *
constDiscountRate
decDiscountedPrice = CDec(tbOriginalPriceTextBox.Text) -
decDiscountAmount
tbDiscountAmountTextBox.Text = decDiscountAmount.ToString("C")
tbDiscountedPriceTextBox.Text = decDiscountedPrice.ToString("C")
Else
MessageBox.Show("Error: Price Field Not Numeric")
tbOriginalPriceTextBox.Focus()
GoTo ProcExit

ProcExit:
Return

End If
tbOriginalPriceTextBox.Focus()

End Sub

Private Sub btnClearButton_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles btnClearButton.Click

tbOriginalPriceTextBox.Clear()
tbDiscountAmountTextBox.Clear()
tbDiscountedPriceTextBox.Clear()
tbDescriptionTextBox.Clear()
tbOriginalPriceTextBox.Focus()

End Sub

Private Sub btnExitButton_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles btnExitButton.Click

'Exit the project

Me.Close()

End Sub
End Class

For and Do loops in VB

2009-02-24T23:24:00.000-08:00

Common features of all programming languages are:

Output
Variables
Input
Repetition
Conditional evaluation
Functions

Visual Basic manifests all of these. Examples:

Output - the caption of a label control is a form of screen output to inform the user
Variables - you can declare them (Dim statement), assign values to them (= operator), declare their type (e.g., AS Single clause), and control their scope by placement (in a method, or in the General section of a form's code) or declaration (local/global, private/public, static keywords).
Input - text boxes are a form of user input
Repetition - loops. There are different kinds. FOR/NEXT, DO/WHILE, DO/UNTIL
Conditional evaluation - If then/End If and Select Case statements

Functions - built-in functions (e.g., IsNumeric(), Val(), Format()) or user-defined functions

We are now focusing on repetition.

For...Next loops use a numeric variable as a counter to keep track of the number of times the loop actually needs to run. This variable is called an index. A typical For loop:

Dim Index

For Index = 1 to 3

[ do something ]

Next

This will repeat any code between the For and Next statements three times. The value of variable Index will take the value 1, then 2, then 3 on the first, second, and third iteration of the loop, respectively.

The Do loop is an alternative way to repeat a block of code. The Do/While loop is common, and has this form:

Do

[ do something ]

Loop While [ condition ]

Note the Do loop, unlike the For loop, does not necessarily involve a built-in variable (For can't run without one). A Do loop equivalent to the above For loop is:

Dim Limit As Integer
Limit = 3

[ do something ]

Limit = Limit - 1

Loop While Limit > 0

In both cases, when execution reaches the lower bound in the code (Next or Loop statement), a decision is made whether to repeat again based on a condition (with For, whether the index variable has reached the stated maximum; with Do, or whether the condition coded in the Loop statement remains true). If the decision is yes, the block of code inside the loop is repeated once again. If no, the loop has finished its job and the next statement below the loop gets executed.

C Programmer’s Guide to Getting a little work done in Visual Basic 6.0

2008-12-11T23:28:00.000-08:00

Introduction

The goal of this document is to allow someone with a little knowledge of C write very simple

programs in Visual Basic. By no means does it tell you all you need to know to be a good Visual

Basic programmer, but I hope it gives you a feel for the language. After reading this, if you want

to write programs with lots of bells and whistles, you can buy a Visual Basic book and teach

yourself the fancy stuff.

Making a new Project

When you start up Visual Basic it should bring up the new project window (see below). (If it

doesn’t display the window when you start it up, select “New Project” from the file menu.)

• Click on Standard EXE and say OPEN

Creating a window

In Visual Basic, before you write any code, you have to design your form. Unlike in C, you can’t

do anything in Visual Basic without a form. You can design fancy forms, but we’re just going to

do a very simple one that will allow you to get input from the user and display output.

When your new project opens, you get a blank form labeled Form 1. This form is actually the

window that your program will run in. You can see what it looks like running by pressing the

“play” button (looks like a triangle) at the top of the page. Pressing the “stop” button (the square)

stops the program.

Most people like their programs to have a special name at the top, instead of just form 1.

• Go to the properties menu on the right side of the Visual basic window. It looks like the picture

below.

• Highlight the words “Form1” under caption and change it to “My Way Cool Program”

• Hit play to look at your cool form, and then hit stop.

Adding a Button

Let’s give your user something to click

• On the toolbox (picture at right) double click on the button (right

below the box labelled “ab|”

• Drag the butoon down a bit on your form so it’s on the lower third of

the form.

• Go to the properties box. Change the Caption of your button to

Push Me

• Also in the properties box, change the (name) of your button from

Command1 to

my_button

• Your form should now look like the picture below.

• Run your program. You will now have a button you can click (but

that doesn’t do anything!)

Writing “Hello, World” (or, Adding a picture box)

Now let’s start doing a little programming. We’re going to write a program that prints “Hello,

World” on the screen when you press the button.

• On the toolbox (picture at right) double click on the desert picture to get a picture box.

• Slide it down and stretch it out a bit so that your picture looks like the one below

• Go to the properties box. Change the name of your picture box (at the top, under (Name) )

from Picture1 to

my_output

Here’s how we want your program to work: When the user pushes the button, we want to print

something on the picture window. Do this as follows:

• Double click on your button (that says “push me”) to tell visual basic you want to program

what happens when the user clicks the button.

• Write the following program:

Private Sub my_button_Click()

my_output.Print "Hello, World"

End Sub

This program basically says “when my button gets clicked, print “Hello, World” on the picture

box called my_output. Close the program window, and run your program.

If you want, add another line right after the first print line that says

my_output.Print "How are you?"

and run your program again.

Adding a text box

It’s convenient to give your user a place to put information.

• On the toolbox (picture at right), double click on the “text box” button (labelled “ab|”)

• Go to the “Text” property, and erase the value on the right.

• Go to the (Name) of your textbox, and change it to

my_input

• Move the objects around so that your form looks like the picture below.

• Run your program. Now you can type whatever you want in the text box. It doesn’t do anything,

but it’s fun to type.

Adding A label

Labels help your user know that they are expected to enter data.

• Click once on the capital letter A and drag it on your form to add a label. (You could also double

click like before)

• Change the caption (on properties) of your label to:

Feet:

• Click on the font property and then click on the 3 dots and change it to Times New Roman 12

point bold

• Use the drop down menu (triangle) on the properties to switch to the my_input textbox (or

double click on the text box), and change the text to

(i.e. the number zero)

• Modify your form so it looks like the picture below

Some Programming Information

At this point you’re almost ready to write some more complex visual Basic Programs. Here’s

some basic information you need to know. Here are some common variable declarations in C and

the corresponding declarations in VB. Notice that VB does not use semicolons in the declarations.

Assigning values to variables in VB is similar to C. Note, there are no semicolons in VB

assignment statements.

Getting input from the user is a little complicated in VB, because you have to know where they

are putting it. On our form, the user will be typing in the my_input window. Here’s how you do it.

NOTE: If you want to input more than one thing from the user, you need to create more input

boxes.

Declaring Variables

Declaration in C Declaration in Visual Basic

int my_favorite_num; Dim my_favorite_num as Integer

float weight; Dim weight as Single

float height; Dim height as Single

Some Assignment Statements

Assignment in C Assignment in Visual Basic

my_favorite_num = 5; my_favorite_num = 5

weight = 6.2; weight = 6.2

height = weight; height = weight

weight = weight + 2; weight = weight + 2

Getting input from the user

Input in C from stdin Input in the my_input text box in VB

scanf("%d",

&my_favorite_num);

my_favorite_num = Val(my_input.Text)

scanf("%f",

&height)

height = Val(my_input.Text)

Comments

Comments in C Comments in VB

/* This is a comment in C

’Comments in VB Start with a quote

’and go to the end of the line.

’Multi-line comments need a quote

’at the start of each line

A more complex program: converting feet to inches

Double click on the button again to bring up the code window. Edit the code so it looks like this:

Private Sub my_button_Click()

'Step 1: Declare two variables

Dim how_many_feet As Single

Dim computed_inches As Single

'Step 2: Get your input

how_many_feet = Val(my_input.Text)

'Step 3: Convert from feet to inches

computed_inches = how_many_feet * 12

'Step 4: Clear the picture window

my_output.Cls

'Step 5: Print your answer in the picture window

' Note that semicolons allow you to print things on

' the same line (i.e. they stop a \n)

my_output.Print how_many_feet;

my_output.Print " feet is the same as ";

my_output.Print computed_inches;

my_output.Print " inches!"

End Sub

More Programming Information

Conditionals in C and VB

Conditionals in C Conditionals in VB

if (expression)

{

code;

more code;

even more code;

}

If expression Then

code

more code

even more code

End If

if (expression)

{

code;

more code;

}

else

{

some more code;

and a bit more;

}

If expression Then

code

more code

Else

some more code

and a bit more

End If

Comparison Operators

C VB

> >

>= >=

< <

<= <=

!= <>

= = =

Another program to try:

Private Sub my_button_Click()

'Step 1: Declare two variables

Dim how_many_feet As Single

Dim computed_inches As Single

'Step 2: Get your input

how_many_feet = Val(my_input.Text)

'Step 3: Clear the output window

my_output.Cls

'Step 4: If the input is negative, complain

' Otherwise do the computation

If how_many_feet <>

my_output.Print "Please enter a positive number for feet!!!"

Else

computed_inches = how_many_feet * 12

my_output.Print how_many_feet;

my_output.Print " feet is the same as ";

my_output.Print computed_inches;

my_output.Print " inches!"

End If

End Sub

Loops

Acknowledgements

Thanks to Schneider’s “An Introduction to Programming Using Visual Basic 6.0” for some

introductory ideas.

Loops in C and VB

C VB

while (expression)

{

code;

more code;

}

Do While

code

more code

Loop

for (i=5; i<=23; i++)

{

code;

more code;

}

For i = 5 to 23

code

more code

Next i

for (i=10; i<=30; i=i+5)

{

code;

more code;

}

For i = 10 to 30 Step 5

code

more code

Next i

Visual Basic Objective Questions

2008-11-20T02:01:00.000-08:00

Visual Basic	Isnull(), IsEmpty() determines weather any variable has been initialize or not	True	False			A
Visual Basic	IsDate() function returns true if its argument is a valid date and time	True	False			B
Visual Basic	It is possible to declare 'Dynamic Array' in visual basic.	True	False			A
Visual Basic	In visual basic 'Break' statement could be used along with "Select Case"	True	False			B
Visual Basic	Constants are processed faster than variables :	True	False			A
Visual Basic	It is possible in visual basic to specifying array limit like from 1 to 10	True	False			A
Visual Basic	It is possible to build an application without using any form:	True	False			A
Visual Basic	Function can return array as return value:	True	False			A
Visual Basic	When using do loop-while statement then the statements within the loop body will be executed only once if the condition does not fulfilled	True	False			A
Visual Basic	ABS() function will generate a hole value when used with a number with fraction part (ex: 125.26598)	True	False			A
Visual Basic	Time() function is used to recover date & time.	True	False			B
Visual Basic	Now() function will return the current drive and directory you are working on as return value.	True	False			B
Visual Basic	The amount of text any one can place in text box is maximum 64 kb.	True	False			A
Visual Basic	In a text box control the default caption for text box is text1.	True	False			B
Visual Basic	It is possible to change the password character property of text box control at run time.	True	False			B
Visual Basic	Sorted property of list box control is a design time property and cannot be changed in runtime.	True	False			A
Visual Basic	Sorted property of list box control is a design time property and cannot be changed in runtime.	True	False			A
Visual Basic	List count property returns total number of items in list box control.	True	False			A
Visual Basic	When someone uses the code like list1.list(1); then it will return the first item of the list box control.	True	False			B
Visual Basic	It is possible to insert a picture in a option button control.	True.	False			A
Visual Basic	It is not possible to change the back color property of option button control at run time.	True	False			B
Visual Basic	by default 'Dim myvar' this statement:	True	False			A
Visual Basic	Sort is a method by which elements can be sorted in flexgrid control	True	False			B
Visual Basic	CommonDialog control is the default control that anyone can find in the toolbar when a new project is started	True	False			B
Visual Basic	The title of the dialog box can be changed.	True	False			A
Visual Basic	Dialog title property is used to change the title of any dialog box	True	False			A
Visual Basic	Flag property is used to adjust the function of each common dialog box	True	False			A
Visual Basic	If the Flag constant for the font common dialog box is cdlCFPrinterFonts then it causes the dialog box to show only the fonts supports by the printer specified by the hdc property	True	False			A
Visual Basic	CommonDialogs control is visible at runtime	True	False			B
Visual Basic	Activate event is called before load event	True	False			B
Visual Basic	Terminate is a valid event in form operation	True	False			A
Visual Basic	In runtime it is not possible to change the form size.	True	False			B
Visual Basic	The default startup object can not be changed in a project	True	False			B
Visual Basic	It is possible to access a menu without using mouse, to access the menu ;pressing the Ctrl key and the letter assigned to access the menu	True	False			B
Visual Basic	It is possible to change the shortcut key assigned to any menu for accessing within the menu editor.	True	False			B
Visual Basic	The project extension name of a VB project is .vbj	True	False			B
Visual Basic	Delete method of the recordset of Data Control or Data Access Object is delete the record which is pointed out by the record pointer.	True	False			A
Visual Basic	The other Single Document Interface forms are by default child of MDI form when MDI form is inserted.	True	False			B
Visual Basic	It is possible to load a MDI form without any childform.	True	False			A
Visual Basic	The arrange property of MDI form is available at design time.	True	False			B
Visual Basic	In case of visual basic, IDE means :	Internal Database Engineering.	Integrated Database Environment.	Integrated Development Environment.		C
Visual Basic	The full form of IIS is :	Indian Institute of Science.	Internet Information Service	Industrial Information Services.		B
Visual Basic	In visual basic you can draw something in	Picture box control.	Image control.	Shape control.		A
Visual Basic	To run an application you have to press :	F3	F6	F5	F7	C
Visual Basic	In visual basic the default unit is :	centimeter.	Inch.	Dpi.	Twips .	D
Visual Basic	Currency variable stores fixed point numbers with :	2 decimal digits.	3 decimal digits.	4 decimal digits.	6 decimal digits.	C
Visual Basic	The size of 'Boolean' data type is :	1 Byte.	2 Bytes.	4 Bytes.	8 Bytes.	B
Visual Basic	In database application, any field does not contain any values can be recognized by:	Nothing value.	Null value.	Error value.	Empty value.	B
Visual Basic	Redim statement is used to :	Rename a variable.	Rename an array.	Redimension an array.		C
Visual Basic	Function Add(Num1 as integer, Num2 as integer) as integer Add=Num1+Num2 Num1=0 Num2=0 End function This body is an example of calling up a function by:	By optional argument.	By value.	By reference.		C
Visual Basic	To get the property window in visual basic you have to press	F6	F3	F4	F5	C
Visual Basic	To get the property window in visual basic you have to press :	F3	F6	F4	F6	C
Visual Basic	Visual Basic produce:	3 types of executable code.	2 types of executable code.	4 types of executable code	none of the above.	B
Visual Basic	In visual basic Bool variable stores	2 bytes	1 bytes	4 bytes	none of the above.	D
Visual Basic	By default 'Dim myvar' this statement:	allocates memory for integer variable	allocates memory for variant variable	allocates memory for Double variable	allocates memory for Boolean variable	B
Visual Basic	Suppose there are two forms; form1 and form2 ; if there are codes like : In form1.active event Form2.show And in form2.active event Form1.show Then what will be the output ?	Two forms will be just showed.	Two forms will be showed and the control will passed continuously to each other.	Nothing will be displayed	None of the above.	B
Visual Basic	A single function of visual basic takes:	Fixed number of parameters	Unlimited number of parameters	All of the above	None of the above	B
Visual Basic	In a programme body : Private sub form_load() X=inputbox("First No. :") Y=inputbox("Second No. :") Z=val(X) +val(Y) Print Z End sub What will be the output ?	The summation of two numbers given in two input box	It will show the numbers given in the input box side by side	It will show nothing	None of the above	C
Visual Basic	when using 'do until-loop' statement as stated below I=10 Do until I>5 Print I I=I+1 Loop This statement will print	it will generate a run time error	no output will be shown	10 11 12 13 14 15	none of the above	B
Visual Basic	which control structure are working under false condition	do-while loop & do loop-while	while-wend & for loop	do-while loop & while wend loop	do-until loop & do loop-until	D
Visual Basic	what will be the output of the code below : private sub command_click() dim I as integer I=0 Do Print I Loop until I>10 End sub	it will generate compile time error	it will generate runtime error	it is an endless loop	0 1 2 3 4 5 6 7 8 9 10	C
Visual Basic	which should be included when an application is used without any forms	subroutines	function	main	sub-main	D
Visual Basic	It is possible to pass different number parameters to a function when call the function on different time.	To do this one can use in the parameter list of that function	paramarray keyword with the array declaration	argument should be passed as array	none of the above	B
Visual Basic	To break a loop abnormally when satisfying a condition, we can use	Break statement	Exit statement	Both i & ii could be used.	None of the above.	B
Visual Basic	What will be the output when the statements below will execute : Dim a as integer a=0 while(a<5) print a a=a+1 end	It will generate the output like 0 1 2 3 4	It will generate a runtime error	It will generate a compiler error	It will display nothing	C
Visual Basic	You can get the ASCII value of any character or number by using	ASC() function	ASCII() function	There is no function to get the ascii value.		A
Visual Basic	Say there is a string "Ramcharan"; when someone using Mid() function like MID("Ramcharan",2) then what will be the output:	"Ra"	"Ch"	"Amcharan"	None of the above	C
Visual Basic	What is the default value of MaxLength property of text box control?	255 characters	10 characters	0 characters	Any of the above	C
Visual Basic	Instr$(text1.text,"visual") will returns :	No. of times the string "visual" is present in the string in text1.text.	It puts the control where it finds the text "visual" in the string given in text1.text.	First occurrence of the text "visual" within the string given in text1.text	None of the above.	C
Visual Basic	What is the default value for multi-select property of list box control.	1	2	0	none	C
Visual Basic	If you want a list box control with check box option, which property of list box control you will have to change.	Check box property	Check style property	Style property	None	C
Visual Basic	Which property of list box control reports the number of selected items.	ListIndex	Selected	Selcount	NewIndex	C
Visual Basic	Through which property of option button control one can change the font color of the caption.	Back color	Font color	Fore color	None	C
Visual Basic	If there is a control array of label for 10 elements, then what will be the fifth element in the array?	label(5)	label(3)	label(4)	None	C
Visual Basic	The fundamental property of RichTextBox control is	Text property	TextRTF property	RTFText property	All of the above	C
Visual Basic	One can change or read the alignment of one or more paragraph of rich text box control through	Text Alignment property	AlignmentSet property	SelAlignment property	None	C
Visual Basic	RichTextBox1.BulletIndent=5 ; what will be the effect of this code if used in any program	It will set the bulleted indentation by the specified value	It will create a list of bullet of 5 items	All of the above		A
Visual Basic	To add the commondialog control to any project one has to include it from	File menu->component->Microsoft Common Dialog Control 6.0	Project menu->Component-> Microsoft Common Dialog Control 6.0	Component menu->project-> Microsoft Common Dialog Control 6.0	None of the above	B
Visual Basic	CommonDialog1.ShowOpen Filename1=CommonDialog1.Filename The above code will	Set the filename1 by the selected filename from the common dialog contol.	First displays the open dialog box and let the user select any file from any	location and then set the filename1 by the selected filename.	Both are true.	B
Visual Basic	Min and Max property can be used with Font common dialog box to determine	To controlling dialog box size	The minimum and maximum size displayed in the size list	None of the above		B
Visual Basic	To enable apply button in dialog box ; flag value should be set to	cdlCFApply	cdlcfTTOnly	cdcclHelpButton	None of the above	A
Visual Basic	If the user wants to select the multiple files from file open and filesave dialog boxes then the flag must be set to	cdlOFNMultiselsectAllow	cdlOFNAllowMultiselect	It is not possible to select more than one file at a time	None	B
Visual Basic	To draw a form on the screen which event is being called up	Draw Event	Load Event	Paint Event	Either i or iii	C
Visual Basic	In form load event, if the following code is written then guess what will be the output : Dim I as integer, J as integer I=0 J=5 While I Print I I=I+1 Wend	output will be 0 1 2 3 4	No output, blank form will be shown	Compiler error	None	B
Visual Basic	Data1.Recordset.FindFirst "State=NY" The above code will find the record in a given database	Find the first record in the given database	Find the first record in the given database in which the state is NY.	The above command will find a record very fast where the state is NY	None of the above	B
Visual Basic	Suppose there is a data control named data1. What will be the effect if the following code is inserted	Data1.recordset.movefirst	The record pointer will move to the first record of the record set	The pointer will move to the first record of the original table that contains the data	It will refresh the recordset	B
Visual Basic	MDI form1.Arrange vbTileHorizontal; this code in a MDI form will	If there are more than one MDI form then arrange them all in horizontal manner	Tiles all child form in horizontal manner	Tiles the MDI form horizontally	None of the above.	B
Visual Basic	DocumentForm() it is	A function of MDI forms	An array of forms using as child into MDIform	None of the above		B
Visual Basic	Visual Basic has ____________ number of editions	3	4	5	6	A
Visual Basic	While running an application you can change the value of any variable and see it's effect through ___________ window.	intermediate	Immediate	current		B
Visual Basic	You can get a dropdown list and as well as can add some text directly to ____________ Control.	listbox	command	Combo Box.	none of this	C
Visual Basic	In _______________ control you can get only drop-down list of the content but cannot add directly anything to that control.	text box	combo box	List Box Control		C
Visual Basic	_____________ property of any control cannot change at run time.	color	name	caption		B
Visual Basic	The maximum length of a variable is _____________ characters.	255	254	256	257	A
Visual Basic	In visual basic, number of loop control structure is _____________.	4	5	6	7	C
Visual Basic	In timer control _____________ is the most important property.	Interval.	Front	backcolor		A
Visual Basic	There are _________________ no. of built in windows dialog boxes provided by common dialogs control.	6	7	8	9	A
Visual Basic	The extension name of a Visual Basic form is _____________.	.frm	.txt	.prj	.vbp	A

VB Best Faqs

2008-10-15T04:22:00.000-07:00

1. How do you center a form?
2. Can I send keystrokes to a DOS application?
3. Convert an RGB value to a long, or a long to RGB.
4. Implement smooth scrolling for either text, graphics or controls across a form.
5. Implement some quick and easy encryption (can be something primitive).
6. 4 different types of sorts: advantages and disadvantages.
7. Compute CRC32 checksum, write a quick piece of code that accepts the packet of data and returns the CRC.
8. How do you use the Mouse OFF event?
9. How do I call Windows Help files from a VB program?
10. How do I create a textbox that lets you insert tabs?
11. How do I make text box that displays asterisks when the user types in data such as password?
12. How do I create multi-column combo box?
13. How do I make a menu popup from a CommandButton?
14. How to create menus at run time in VB?
15. Write a generic error handling routine.
16. How to copy text to the Windows clipboard and from it.
17. How can I call a Command button without clicking it?
18. Write a simple app with Encrypt and Decrypt buttons and Textbox where the user can enter text for encryption and decryption.
19. The Answer to question 17 is that u need to set the value property of command button to true
Siddharth
20. 16) How to copy text to the Windows clipboard and from it.
ans :
for Retreiving data from clipboard other then text
Clipboard.getData for other then text format data
for setting data other then text
for assigning data to clipboard other then text
Clipboard.setData for other then text format data
Clipboard.getText
Clipboard.SetText
viceversa
Siddharth
21. Answer for 11 Question : Set Text Box PasswordChar Property to *
Kalyani
22. Answer to 1st Question: Set Form StartUpPostion Property to 2-CenterScreen.
Answer to 13th and 14Th Questions :Use CreatePopupmenu API function .
Kalyani
23. LongValue = RGB(RedValue,GreenValue,BlueValue)
can convert RGB to long value
Manu
24. Hello to all
Some of the answers of Above questions are there at http://www11.brinkster.com/binoj/vbhowto.htm#
Kalyani
25. 1.
‘ Center form on the screen
formname.Left = Int(Screen.Width - formname.Width) / 2
formname.Top = Int(Screen.Height - formname.Height) / 2
odette
26. How do you center a form?
Set Form StartUpPostion Property to 2-CenterScreen
OR
Private Sub Form Load ()
Me. Top = Screen. Height / 2 - Me. Height / 2
Me. Left = Screen. Width / 2 - Me. Width / 2
End Sub
Sumesh
27. Can I send keystrokes to a DOS application?
AppActivate (”C:\windows\system32\cmd.exe”) ‘ Appilcation caption
SendKeys (”SA”) ’For sending one string
SendKeys “% ep”, 1’ For sending Clipboard data to Dos
Sumesh
28. Convert an RGB value to a long, or a long to RGB
RGB (210, 120, 34)
QBColor (2)
Sumesh
29. Implement smooth scrolling for either text, graphics or controls across a form.
Autoredraw = true
Sumesh
30. Implement some quick and easy encryption (can be something primitive).
Take string, convert each charter to hex.
get private key, get private key hexs added up.
Add cahracted hex and pvtkey hex.
Not it.
give a seperator and do out.
Reverse gives decoding as shown below
Private Sub Form_Load()
Dim A As String
Dim str As String
Dim str1 As String
Dim I As Long
Dim AscChar() As String
Dim hexArray() As Long
Dim pvtKey As String
Dim hexKey() As Long
Dim hexKeyVal As Long
Dim outstring As String
Dim strTmp() As String
Dim GetVal() As Long
Dim Decodedstr As String
ReDim AscChar(0)
ReDim hexArray(0)
ReDim hexKey(0)
str = “Sumesh” ‘ input string
pvtKey = “vrs” ‘ private key for encryption
For I = 1 To Len(pvtKey)
ReDim Preserve hexKey(I)
‘AscChar(I) = Mid(pvtKey, I, 1)
hexKey(I) = Asc(Mid(pvtKey, I, 1))
hexKeyVal = hexKeyVal + hexKey(I)
Next I
For I = 1 To Len(str)
ReDim Preserve AscChar(I)
ReDim Preserve hexArray(I)
AscChar(I) = Mid(str, I, 1)
hexArray(I) = Not (Asc(AscChar(I)) + hexKeyVal)
If outstring = “” Then
outstring = CStr(hexArray(I))
Else
outstring = outstring + “,” + CStr(hexArray(I))
End If
Next I
strTmp = Split(outstring, “,”)
ReDim GetVal(UBound(strTmp) + 1)
For I = 0 To UBound(strTmp)
GetVal(I) = Not (strTmp(I))
GetVal(I) = GetVal(I) - hexKeyVal
Decodedstr = Decodedstr + Chr$(GetVal(I))
Next I
MsgBox “Input string : ” + str + vbNewLine + “Encoded string : ” + outstring + vbNewLine + “Decoded string : ” + Decodedstr
End Sub
Sumesh
31. How do you use the Mouse OFF event?
Ole Drag drop
Sumesh
32. How do I call Windows Help files from a VB program?
Public Declare Function WinHelp Lib “user32″ Alias “WinHelpA” (ByVal hWnd As Long, ByVal lpHelpFile As String, ByVal wCommand As Long, ByVal dwData As Any) As Long
Sumesh
33. How do I make text box that displays asterisks when the user types in data such as password?
Text1.Passwordchar =”*”
Sumesh
34. How do I create multi-column combo box?
Combo1.style = simple combo
Sumesh
35. How do I make a menu popup from a CommandButton
Call TrackMenuPopup defined in user32.dll, declaration follows :
Public Declare Function TrackPopupMenu Lib “user32″ (ByVal hMenu As Long, ByVal wFlags As Long, ByVal X As Long, ByVal Y As Long, ByVal nReserved As Long, ByVal hWnd As Long, lprc As Any) As Long
Sumesh
36. Write a generic error handling routine.
Public Sub GenericErrMsg(I As Long, B As String)
Dim A As String, I1 As Long
B = StrAnsi(B)
GTPRODUCT = “Sumesh’s new software”
Select Case I
Case 1
A = “Can’t load project: ” + B: I1 = 48
Case 2
A = “Can’t save project” + B: I1 = 48
Case 3
A = “Can’t create net hook ” + B: I1 = 48
Case 4
A = “Can’t find project file: ” + B: I1 = 48
Case 21
A = “Range Error: ” + B: I1 = 48
Case 22
A = “Can’t load Sumes font, default assumed.” + B: I1 = 48
Case 23
A = “Can’t exceed 25 characters.” + B: I1 = 48
Case 24
A = “Password can’t exceed 8 characters.” + B: I1 = 48
Case 101
A = “Already exists: ” + B: I1 = 48
End Select
MsgBox A, I1 Or MB_SYSTEMMODAL, GTPRODUCT
End Sub
Sumesh
37. What is the difference between ADO vs RDO ?
Shiraz
38. What is the difference between ActiveX Exe And Standard EXE ?
Tushar
39. what is called inprocess & outprocess,? explain the differnce
singanan
40. 1).The answer of first question is set form startup-position to center-owner or center-screen.
KingKalon
41. Ans 15). u just call this function. & u catch the compleate error Hierarchy very easily.
Public Function MakeLogFile(ByVal ErrorPosition As String) As String
Dim sFileName As String
Dim iFileNo As Integer
If ErrorPosition <> “” Then
sFileName = App.path & “\ErrorLogFile.txt”
iFileNo = FreeFile
Open sFileName For Append As #iFileNo
Print #iFileNo, “Error No = ” & Err.Number
Print #iFileNo, “Error Description = ” & Err.Description
Print #iFileNo, “ErrorPosition = “; ErrorPosition
Print #iFileNo, “Date = ” & Date
Print #iFileNo, “Time = ” & Time
Print #iFileNo, “”
Close #iFileNo
End If
End Function
if wants any more answers mail me at: kingkalon@yahoo.com
KingKalon
42. The answer for 17th question :
private sub command1_click()
msgbox(”Hello world”)
end sub
private sub Command2_click()
command1_click
end sub
Vidya
43. How do I make a menu popup from a CommandButton
Ans :
Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
PopupMenu Menuname
End If
End Sub
By Jerrin
To solve your queries visit http://www.websamba.com/jerrin enter ur questions as feedback. I will reply as mail
Anonymous
44. How do I make a menu popup from a CommandButton
Ans :
Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
PopupMenu Menuname
End If
End Sub
By Jerrin
To solve your queries visit http://www.websamba.com/jerrin enter ur questions as feedback. I will reply as mail
Jerrin
45. How do I make a menu popup from a CommandButton
Ans :
Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
PopupMenu Menuname
End If
End Sub
By Jerrin
To solve your queries visit http://www.websamba.com/jerrin and enter ur questions as feedback. I will reply in mail .
Jerrin
46. How do I make a menu popup from a CommandButton
Ans :
Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 2 Then
PopupMenu Menuname
End If
End Sub
By Jerrin
To solve your queries visit http://www.websamba.com/jerrin and enter ur questions as feedback there. I will reply in mail .
Jerrin
47. Answers are to the point,
Still some of the answers are breath taking (since i am novice to this vb)
Sridhar.V
48. How to copy text to the Windows clipboard and from it.
Clipboard.SetData
and
Clipboard.GetData
Sumeshvr@hotmail.com
49. How can I call a Command button without clicking it?
RaiseEvent
Sumeshvr@hotmail.com
50. How do I create multi-column combo box?
VB6’s combo box doesn’t allow for multiple columns in its combo boxes.
If you want to display multiple columns you can concatenate the columns together
or create your own control
or by a third party combo box control
Judith
51. how many cookies are stored in server?
How to give the security in vb application and asp?
gulam mohamed
52. like ‘option explicit’ is there any thing like ‘option base..’ pls let me know.
and what does it mean in visual basic
amit jadhav
53. Option Base is to set the Index of the Array to start from 0 or 1.
Like option explicit.. declare “Option base 1″ at the top. now the array will start from Index 1.
By default the index starts from 0.
Anand
54. Multi Column Combobox - If you need a Multicolumn combobox.. the best suitable control in VB is ListView Control. This should fit your need.. which can display multi column and also the checkbox facility for each row.
Anand
55. Q- difference between RDO and ADO
A- ADO can access data from flat files as well as the databases,it is the encapsulation of DAO,RDO,OLE and hence called as OLE-DB technology.RDO follows a hierarchy model following its base objects rdoenvironment,rdoconnections,rdoresultset,rdoqueryobject which gives a way to manage multiple connections and multiple result set objects but is expensive to implement unwanted object persistence.
Reena
56. one can find good questions along with their answers over here :
http://www11.brinkster.com/binoj/vbhowto.htm#How%20to%20use%20Len%20function?
Reena
57. This is a suitable site, candidates like me.
Q. How do I know the caption-tip of menus in my MDI’s Status Bar? Like if I have a Menu:- File->Edit, as soon as the user move the mouse on this menu a description is shown in the Status Bar “Edit your tasks.”.
Please mail the answer at g_arora@hotmail.com
Thanks,
Gaurav Arora
Gaurav Arora
58. I wish to thank all those who have shared their knowlede, and it was of great help.
How do you detect if any one of the diffrent forms I have in an application is used ( either a keypress or a move movement).
I have done this by keeping a global flag and keeping a timer on each form (some of which are not child to the mdi form). I am sure there is a better way to deal with this.
Thanks
SP
shiburaj
59. How to trap the alt key in the text box?
jai
60. What is the difference between ADO vs RDO ?
ADO is most similar to RDO. ADO “flattens” the object model used by RDO, meaning that it contains fewer objects and more properties,methods and events.
kiran
61. To Trap the Alt Key in a TextBox you will probably have to make use of API’s in VB.
Nitin Shinde
Web Developer
http://www.websamba.com/nitinshinde
Nitin Shinde
62. 1. How to test a dll?
2. Two ways of creating objects.
3. How to optimise the SQL statement?
4. Diff types of Cursors, Locks
5. Diffrence of Proc & Fn in SQL Server
6. Microsoft recommended method of connection
7. Diff between left and right outer join
Sudheer
63. Great help for VB developers.Thanks for all those who share their knowledge.
sureshnanubala
64. i want to know about the different between rdo and ado.
different between dll and com
senthil
65. what is the difference between ado,rdo and dao????
babita
66. Option Explicit
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Declare Function SystemParametersInfo Lib “user32″ Alias “SystemParametersInfoA” (ByVal uAction As Long, ByVal uParam As Long, ByRef lpvParam As RECT, ByVal fuWinIni As Long) As Long
Private Const SPI_GETWORKAREA = 48
‘ Center the form taking the task bar
‘ into account.
Private Sub CenterForm(ByVal frm As Form)
Dim wa_info As RECT
Dim wa_wid As Single
Dim wa_hgt As Single
Dim wa_left As Single
Dim wa_top As Single
If SystemParametersInfo(SPI_GETWORKAREA, _
0, wa_info, 0) 0 _
Then
‘ We got the work area bounds.
‘ Center the form in the work area.
wa_wid = ScaleX(wa_info.Right, vbPixels, vbTwips)
wa_hgt = ScaleY(wa_info.Bottom, vbPixels, vbTwips)
wa_left = ScaleX(wa_info.Left, vbPixels, vbTwips)
wa_top = ScaleY(wa_info.Top, vbPixels, vbTwips)
Else
‘ We did not get the work area bounds.
‘ Center the form on the whole screen.
wa_wid = Screen.Width
wa_hgt = Screen.Height
End If
‘ Center the form.
frm.Move (wa_wid - Width + wa_left) / 2, _
(wa_hgt - Height + wa_top) / 2
End Sub
‘ Center the form.
Private Sub Form_Load()
‘ Make the form really big so it’s
‘ easy to see that it is centered.
Width = Screen.Width - 1440
Height = Screen.Height - 1440
‘ Center the form.
CenterForm Me
End Sub
rohit
67. “Option base ” is used to set the start index for an array.It must be defined at the top of the code in the declaration part.
e.g Option base 0
Yogi
68. Q. How to trap the Alt key in the TextBox ?
A. Use the KeyDown Event of the Text Box. The “Shift as integer” parameter in Keydown Event code holds the keycodes against the “Alt,Ctrl etc. keys).
Yogi

VB Faqs

2008-10-15T03:07:00.001-07:00

1. 3 main differences between flexgrid control and dbgrid control
2. ActiveX and Types of ActiveX Components in VB
3. Advantage of ActiveX Dll over Active Exe
4. Advantages of disconnected recordsets
5. Benefit of wrapping database calls into MTS transactions
6. Benefits of using MTS
7. Can database schema be changed with DAO, RDO or ADO?
8. Can you create a tabletype of recordset in Jet - connected ODBC database engine?
9. Constructors and distructors
10. Controls which do not have events
11. Default property of datacontrol
12. Define the scope of Public, Private, Friend procedures?
13. Describe Database Connection pooling relative to MTS
14. Describe: In of Process vs. Out of Process component. Which is faster?
15. Difference between a function and a subroutine, Dynaset and Snapshot,early and late binding, image and picture controls,Linked Object and Embedded Object,listbox and combo box,Listindex and Tabindex,modal and moduless window, Object and Class,Query unload and unload in form, Declaration and Instantiation an object?
16. Draw and explain Sequence Modal of DAO
17. How can objects on different threads communicate with one another?
18. How can you force new objects to be created on new threads?
19. How does a DCOM component know where to instantiate itself?
20. How to register a component?
21. How to set a shortcut key for label?
22. Kind of components can be used as DCOM servers
23. Name of the control used to call a windows application
24. Name the four different cursor and locking types in ADO and describe them briefly
25. Need of zorder method, no of controls in form, Property used to add a menus at runtime, Property used to count number of items in a combobox,resize a label control according to your caption.
26. Return value of callback function, The need of tabindex property
27. Thread pool and management of threads within a thread pool
28. To set the command button for ESC, Which property needs to be changed?
29. Type Library and what is it’s purpose?
30. Types of system controls, container objects, combo box
31. Under the ADO Command Object, what collection is responsible for input to stored procedures?
32. VB and Object Oriented Programming
33. What are the ADO objects? Explain them.
34. What are the different compatibility types when we create a COM component?
35. What do ByVal and ByRef mean and which is the default?
36. What does Option Explicit refer to?
37. What does the Implements statement do?
38. What is OLE and DDE? Explain.
39. What is the difference between Msgbox Statement and MsgboxQ function?
40. What keyword is associated with raising system level events in VB?
41. What methods are called from the ObjectContext object to inform MTS that the transaction was successful or unsuccessful?
42. What types of data access have you used.
43. What was introduced to Visual Basic to allow the use of Callback Functions?
44. Which controls can not be placed in MDI?
45. Which controls have refresh method, clear method
46. Which Property is used to compress a image in image control?
47. Which property of menu cannot be set at run time?
48. Which property of textbox cannot be changed at runtime and What’s the maximum size of a textbox?
49. Which tool is used to configure the port range and protocols for DCOM communications?
50. Question asked to me in interview:
1) Assume i have created a dll in c++ which doesn’t have any class. It only have one function. How can i call that function in VB.
2) What is control array and maximum limit of control array.
3) Which one you will prefer for working with databases - OLEDB or ADO’s and why.
4) What is the difference between Active X DLL & Active X Exe.
comment by Pramod
51. What are Disconnected Recordsets? Advantages?
The ADO has the ability to work offline with recordsets.
The ADO Maintains the informations such as Database name,Server in which the database reside,username and password etc…After loacting a recordset it disconnects and work with them and finally send it back to the database by re-establishing the connection by making use of the already stored informations about the connetion and the database.
Advantage: Minimizes the Load on the SErver
1.what is MTS??
2.Types of ActiveX Objects and Components??? is there any difference between both these???
comment by Prema
52. respected Sir/madam
i am jitendra Singh Bhaskar.Student of B.Sc(I.T) in Sikkim Manipal University.
i have aproblem with some question of Visual basic .I am not able to define it.
please solve my question.
i am very glad to you
thanking you
jitendra singh bhaskar
Q-Write an event procedure to check whether the given string is Palindrome or not.
Q-Explain the different control structures by giving syntax and one suitable example for each:
1)For…Next Loop.
2)Select Case Statement
3)Do While Loop
comment by Jitendra Singh Bhaskar
53. Respected Sir/Madam,i have a doubt from VB .
1.what is the purpose of Visual Source safe in MicroSoft Visual Studio?
2.What is the difference between datagrid and flex grid control?
3.Explain MTS?
4.What is the different between crystal report and data report?
5.Need of zorder method, no of controls in form, Property used to add a menus at runtime, Property used to count number of items in a combobox,resize a label control according to your caption.
comment by SHAILA
54. Respected Sir/Madam,i have a doubt from VB .
1.what is the purpose of Visual Source safe in MicroSoft Visual Studio?
2.What is the difference between datagrid and flex grid control?
3.Explain MTS?
4.What is the different between crystal report and data report?
5.Need of zorder method, no of controls in form, Property used to add a menus at runtime, Property used to count number of items in a combobox,resize a label control according to your caption.
comment by rakesh kumar
55. respected sir
i have some question
1. what is difference betn db grid and flexgrid
2.how to call astored procedure in ado.
3.what is query unload
4.instancing property of dll.
comment by rakesh kumar

VB Questions

2008-10-15T03:06:00.001-07:00

How do you represent your menu description in the status Bbr of your MDI? So that when I move the mouse over menu option, the description is shown in appropriate status bar?
How would you make a program which scans a bar code and perform action depending on the bar code value?
What is the difference between Windows programming and database programming?
How do you combine a number of ActiveX control, which you developed, into a single app?
How do you interact with the hardware level within your VB code if no APIs or documentation is supplied?

6. Hi,

Difference between Windows Programming and Database Programming
Windows Programming
——————-
Windows programming is depends on designing windows based application software which is called Graphical user interface(GUI).
Database Programming
——————–
Database programming are related to application programme for which we will have front-end and back-end. An application that are developed with the help of connecting database, RDBMS like Oracle,SQL server,windows access,Sybase,etc are known as database application.

7. How do you represent your menu description in the status Bbr of your MDI? So that when I move the mouse over menu option, the description is shown in appropriate status bar?
How would you make a program which scans a bar code and perform action depending on the bar code value?
How do you combine a number of ActiveX control, which you developed, into a single app?
How do you interact with the hardware level within your VB code if no APIs or documentation is supplied?

8. How Many Control can Placed in VB Form

comment by Kumar

9. Ans 2
for displaying the text in status bar subclass the mdi window and in windowproc look for WM_MENUSELECT message and display text as per the id

Ans 3
the maximum number of controls on a form are 256 however the limit can be bypassed by using control arrays . thus the total limit can be 256 * 32000

comment by thencoder

VB6.0 vs. VB.NET

2008-07-24T06:14:00.000-07:00

.NET Platform
To understand VB.NET, we must first understand the .NET platform.

 .NET Framework: a set of approximately 3500 classes.
 These classes are divided into namespaces that group similar classes together.
 For organization, each class belongs to only one namespace.
 Most classes are lumped into a name space called System

System.Data contains classes used for accessing data in a DB
System.XML contains classes used for reading/writing XML
System.Windows.Forms contains classed used for
System.Net contains classes for communicating over the network.

 Essentially MS performed a massive re-organization of all the classes, no longer leaving methods or functions without clearly belonging to a specific class. For example, note the difference between Messagebox() in VB6.0 and Messagebox.Show() in VB.NET (to be discussed later).

Visual Studio.NET
 Visual Studio.NET is the next version of IDE from MS.
Note: VS.NET does require at least double its system requirements to function feasibly.
Note: VS.NET can be installed on the same machine as VS 6.0. Many have warned against it, yet personal experience has proven otherwise.

 VS.NET comes standard with VB.NET, C# (C-Sharp), and VC++.

 VS.NET supports more than 20 languages.

 All languages compile to .EXE and .DLLs containing Common Intermediate Language (CIL or IL), not machine native code. C++ is the only exception offering an option to compile to machine native code.

 These CIL executables then run in the Common Language Runtime (CLR) using a Just-in-Time (JIT) compiler. Note the similarity of .NET to JAVA and JVM.

 The JIT compiler dynamically converts the IL to machine native code during execution, and caches the native code for subsequent use.
Advantages of CLR

 The JIT allows code to run in a protected environment as managed code. The protected environment polices each application to run in its own memory segment. This prevents a developer from shooting himself in the foot, but it also limits control.

 Using a JIT allows the IL code to be hardware independent. As long as the .NET framework is installed, the IL code can be executed.

 The CLR also allows for enforcement of code access security.

 Verification of type safety.

 Access to Metadata (enhanced Type Information)

 Support for developer services (profiling, debugging)

 Interoperation between managed code, COM objects, pre-existing DLLs (unmanaged code and data).
.NET components can access COM components.
COM components can access .NET components by registering the .Net assembly using the regasm.exe utility.

 .NET provides a unified Programming Model
Then: VB for RAD, VC++ for MFC/ATL, ASP for code embedded web pages
Now: Any language to handle any .NET functionality.

.NET Framework supports Web Standards
HTML
XML
XSLT
SOAP
WSDL for Web Services

ILDASM
The IL can be modified using Intermediate Language Dis-assembler (ILDASM). ILDASM is a tool used to properly display IL in a human readable format. A developer can then add remove code as needed for fine tuning. Many developers speak highly of this method for fine tuning code.

Visual Studio.Net vs. Visual Studio 6.0
 Syntax of event handling methods:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

 In VS.Net CTRL-ESC opens inteli-sense for easy searching of methods

 With VB6.0, project files were very simple:
.VBP
.VBW
.CLS / .FRM / .RES

 File structure in .NET varies greatly from VB6.0 file structure.

Note: For a tree diagram of the file structure, enter the following in a DOS prompt.
C:\>Tree C:\VBPrograms\WindowsApplication1 /F /A

C:\VBPROGRAMS\WINDOWSAPPLICATION1
| WindowsApplication1.vbproj
| AssemblyInfo.vb
| Form1.vb
| Form1.resx
| WindowsApplication1.vbproj.user
| WindowsApplication1.sln
|
+---bin
| WindowsApplication1.exe
| WindowsApplication1.pdb
|
\---obj
\---Debug
| WindowsApplication1.Form1.resources
| WindowsApplication1.pdb
| WindowsApplication1.exe
|
+---temp
\---TempPE

 Both .EXE are executable, pending the user has .NET framework installed.

 Use of “Imports System.IO” imports the System.IO. This is similar to the With block code.
Application Deployment
 Use XCOPY
 Downloading code is also available.
 No need to register components.
 Can run multiple component versions simultaneously.

VB Questions (General)

2008-07-24T03:03:00.001-07:00

Dim x, y as integer. What is x and y data type?

X as variant and y as integer.

What is the size of the variant data type?

Variant variable size = 22 + Actual data type size.

What is the return type of Instr and Strcmp?

Instr – integer (Numeric position)
Strcmp - integer ( if both the string are equal they result = 0)
Strcmp (Str1, Str2, Comparetype)
Comparing mode = 0 – Binary Comparing

1 – Textual Comparing

What is the max size allowed for Msgbox Prompt and Input Box?

1024

Max label caption length. –

2,048

Max Text box length –

32,000

Max Control Names length –

255.

Extension in Visual Basic

Frm, bas, cls, res, vbx, ocx, frx, vbp, exe

What is frx?

When some controls like grid and third party control placed in our application then it will create frx in run time.

Name some date function

Dateadd(), Datediff(), Datepart(), Cdate()

what will be the result for

15/4 = 3.75 and 15\4 = 3

What is keyword used to compare to objects?

ISOperator – Returns Boolean.

How many procedures are in VB?

2. function and sub procedures (Ask what is the diff. Between them?)

Where will we give the option explicit keyword and for what?

In the general declarations section. To trap undeclared variables.

What is Friend Variable?

Scope sharable between projects.

What is binding? What are types of binding?

Assigning variable with defined memory space.
Late Binding - Memory size is allotted in later stage.
Ex:- Dim x as object
Early Binding - Memory size is allotted while declaring itself.
New Key word is important.
Ex:- Dim x as New Object

What is the difference between Property Get, Set and Let.

Let – Value is assigned to ActiveX Object from the form.
Let – Value is retried to ActiveX Object from the form.

What is Mask Edit and why it is used?

Control. Restricted data input as well as formatted data output.

Drag and Drop state numbers and functions.

State 0 – Source control is being dragged with the range of a target.
1 – Out of the range of a target.
2 – One positon in the target to another.

What are the type of validation available in VB?

Field, Form

With in the form we want to check all the text box control are typed or not? How?

For each currentcontrol in controls
if typeof currentcontrol is TextBox then
end if
next

What is the result of Null * Any value = 0 (Zero).

What is control array and How many we can have it with in the form?

Group of control share the same name. Max 32, 767.

What is the default model of the form? And what is it number?

VbModaless – 0 (Zero) – We can able to place another window above this form.

Suppose from form1 to form2 object property settings will arise to ?

Invalid procedure call or argument (Run time error – 5)

What is the diff between the Std and Class Module?

Std Global with in the project. Cls Global through out the all project only thing is we want to set the type lib. Class Modules can be Instantiated.

Different type of Instantiation?

Private – Only for the Specific Module.
Public not creatable – Private & Public
Multi Use - Variable we have to declare.
Single Use – Not possible through dll.
Global Multiuse – Have variable not Required to Declare.
Global Single Use - " Only for exe.

How to declare Dll Procedure?

Declare function "" lib "" Alias "" (Arg, …..) as Return type.

What is MDI form? MDI Styles?

We can have only one MDI form for a project. Multiple Document Interface. This form type is VBModal. We have set the Child property of the forms to True to place forms inside this MDI.
Style availables 1. VbCascade 2. VbTitle Horizontal

How many images can be placed in the image list ?

64

What is Inprocess and Out of Process?

Inprocess – It will run with in the memory. ( Local Machine).
Out of Process – It will run out of the memory Normally in the server side.

Diff type of Datatypes?

LOB (Large Object Data type).
CLOB (Stores Character Objects).
BLOB ( Store Binary Objects such as Graphic, Video Chips and Sound files).
BFILE(Store file pointers to LOB It may Contain filename for photo’s store on CD_ROM).

What is Zorder Method?

Object.Zorder = 1 or 0 Place a Specified mdiform form or control at the font or back of the z-order with n its Graphical Level.

What is diff between the Generic Variable and Specific Variable?

Generic Variable:

Create Object Ex:-Ole-Automation . No need refer the object library.

Specific Variable:

Binding Procedure Early and Late Binding ( Can be Remove from the Memory).

What are properties available in Clip Board?

No Properties Available. Only the methods they are SetText, GetText, Setdata(), Getformat(), Clear.

What is Dll?

Libraries of procedures external to the application but can be called from the application.

What is Tabstrip control? What is the starting Index value? How to locate it?

It is tab control to place our controls with in the form in multiple sheets.
Index starts with 1. And to identify

If Tabstrip1.SelectedItem.Index = 1 Then
…..
End if

Why we use Treeview Control?

To list the hierarchial list of the node objects. Such of files and Directories.

Why we need OLE-Automation?Advantages?

Enables an application to exposes objects and methods to other Applications.
No need to reserve memory. No need to write functions. Object library that simplify programming tasks. i.e., No need to Object library. (OLB, TLB).

What is the diff between the Create Object and Get object?

Create Object - To create an instance of an object.
Get Object – To get the reference to an existing object.

Have you create Properties and Methods for your own Controls?

Properties – Public variable of a Class
Method – Public procedure of a class

What is Collection Objects?

Similarly to arrays but is preferred over an array because of the following reasons.

1. A collection objects uses less Memory than an array.
2. It provides methods to add and delete members.
3. It does not required reason statement when objects are added or deleted.
4. It does not have boundary limitations.

What is Static Variable?

Its Scope will be available through out the life time.

Private Dim x as integer.

Private cannot be used in front of DIM.

What is Implicit?

Instance of specific copy of a class with its own settings for the properties defined in that class.
Note: The implicity defined variable is never equal to nothing.

What are the scope of the class?

Public , private, Friend

Can we able to set Instancing properties like Singleuse, GlobalSingleuse to ActiveXDll?

No.

In project properties if we set Unattended what is it mean?

This cannot have user interface. This can be used for the COM creation.

What are the Style Properties of Combo Box?

Simple, Dropdown list – We can type and select.
Dropdown Compo – Only Drop Down.

What are the Style properties of List Box?

Simple –Single Select , Extended. – Multiple Select.

What are the different type of Dialog Box?

Predefined, Custom, User Defined.

What is Parser Bug?

It is difficult to use database objects declared in a module from within a form.

What is the Dll required for running the VB?

Vbrunxxx.dll

Can We create CGI scripts in VB?

Yes.

How to change the Mouse Pointer?

Screen.MousePointer = VBHourGlass/VBNormal.

How to check the condition in Msgbox?

If(Msgbox("Do you want to delete this Record",VbYesNo)=VbYes)Then End if

vb questions 11

2008-07-17T20:03:00.001-07:00

LockEdits property to False - Optimistic locking - update error
What kind of error is the most expected with optmistic lock? Data changed;
operation stopped
Empty value ByVal 0&, vbNullString
Char ByVal a As Byte
Asciiz String ByVal as String
2 deferent DLLs from 2 vendors - declare private or Use the alias keyword
Adressof MyProc - Correct
In which case is a new object created? set x=new form1
Which Option will not allow to create instances : set Public to FALSE
type library and New Keyword are required for Early Binding.
How to raise an event? First to declare it, use the Event keyword,
then Raise it.
Ambient - change the background color of the control on the container
Create a license package file with a utility from the LPK_TOOL directory.
Run-time license: Application Setup Wizard
Design-time license: Application Setup Wizard
Internet license: LPK_TOOL.EXE, and create a reference to the .LPK file
To navigate between the two ActiveX documents, use the HyperLink object and
its NavigateTo method. Use the GoBack or GoForward methods to go backwards
or forwards through the History list. WebBrowser Object - Use GoHome and
GoSearch
Hyperlink offers a help option on Web.
Data persistence is the ability of a component to store and retrieve data.
The Internet Explorer 3.0 (and higher) and Microsoft Office Binder allows
you to write to a file using the PropertyBag.
Create separate secondary .cab files to reduce download time.
Which two project types can contain an ActiveX Document? ActiveX Dll,
ActiveX Exe.
What project types can have ActiveX documents? - All that can be a container
How to convert an ActiveX.DLL to multithread? - Make it ActiveX. EXE
Advantages of Using ActiveX Documents - Support for the Hyperlink object and
AsyncRead method
Which project template would you select to build an in-process code (ActiveX
Document DLL)?
The AsyncRead method initiates an asynchronous download.
Datatypes to be downloaded: files, pictures, byte arrays
Which 2 actions may disqualify a component for being marked as safe for
scripting? inserts in/reads from registry
When an error occurs in a component, call Err.Raise number.
Err.Source returns the name of the object that generated an Error.
Command1_Click() AND Command2_Click() call each other - Out of Stack Space
error
Which task can you accomplish by packaging in .cab file? register on users
computer
Q: There is a www server application that uses ActiveX controls you
developed. When the application page is browsed with IE it does not show
the ActiveX control. What may be happening?
A1: No Internet download license file on the web server
A2: Options in the Application Setup Wizard were not used correctly
Q: Where do you define conditional compiling variables?
Command line
Project Properties dialog box (under the Make tab)
In code
•Q: Difference between debugging an ActiveX control project and an
in-process component?
A: The component code can run while the client is in Design mode
•Q: When testing a UserControl, you add a standard.exe to your project
group. UserControl in the Toolbox is dimmed. What should you do?
A: Close the UserControl designer and then test again
How to view contents of the Variant?
- Use Debug.print
- Look at the Locals window
Q: What cannot be done when an Internet Control is packaged. (Choose Two)
A: Write to a file
Read from the registry
Q: How can you build ActiveX components for Internet distribution?
A: Use the Application Setup Wizard and pick the appropriate options
------------------------------------------------------------------------
Q: Which function can the Setup Wizard (Enterprise Ed.) of VB 5 perform in
addition to installing your ActiveX EXE project?
A: install your project as an ActiveX shared component
Q: What does locales show in different contexts?
A: In Visual Basic, many functions use the user's system locale, which uses
the Control Panel settings provided by the operating system to automatically
determine the conventions at run time. These functions are called
locale-aware functions.
Q: When should you use public variables instead of property procedures for
read-write properties?
A: The property is a String data type, and there is no constrain on the size
or value of the string.
Q: Where and why to use Friend methods and properties
A: The combination of public to classes in the same project and private to
the external.
Q: You have a Data Control with Bound Controls. You want to provide the
ability to abort changes in the record currently being edited and to
refresh the bound controls. How?
A: Only invoke the UpdateControls method for the Data control.
•Q: A list-box is used as a constituent control. The design window is
closed and the control inserted on a form in another project. The user
then sets the sort property of the control which in turn sets the sort
property of the control. Why does the error occur?
A: Compile the control project ?
Q: How to set properties for the individual Column objects?
A: You must make the DBGrid control UI-active: Select the right mouse
button, and choose Edit. Then use pop-up menu.
Q: How to remove column header?
A: object.ColumnHeaders = False
Q: How to refer a colmun?
A: object.ColIndex [= value]
This property returns the zero-based index of a column within the Columns
collection.
Q: How to check the value of a specific field in the current record?
A: MyString = Data1.Recordset.Fields("Title").Value
Data1.Recordset("PubID") = 43' Set the field values.
Data1.Recordset("PubID") = "12345" ' Change the value.
What are the benefits of Forms collection?
- Allows faster unloading of all forms in the project *
- Faster access
- Standardized mechanism for tracking multiple instances of a form *
- Group forms & drag the group
How to handle resizing of the label in a UserControl?
During design time - Label1_Resize
During run-time – UserControl1_resize
How to refer to the contents of the child of the selected node of a TreeView?
Set nodChild = TreeView1.Nodes(TreeView1.SelectedItem.Index).Child
•
•tvwMyTree.Nodes(10).Children ‘ return the number of children
tvwMyTree.Nodes(10).Parent.Text ‘ return the Text of Parent
What properties can you set while using the Add property for a list view?
•ColumnHeader object.Add(index, key, text, width, alignment, icon)
Which type of Instancing should you use for the class module?
A. private
B. multiUse
C. GlobalMultiUse
D. PublicNotCreatable *

vb questions 10

2008-07-17T20:01:00.002-07:00

Q: Why would you want to set the LockEdits property to False?
A: Optimistic locking is in effect for editing. The 2K page containing the
record is not locked until the Update method is executed.
What kind of error is the most expected with optmistic lock? Data changed;
operation stopped
If recordset.lockedits=false, which would be the most like to occur:
A. update error: record locked on by *
B. save error: record locked on by
C. can not read database...
Incorporate dynamic-link libraries (DLLs) into an application.
•Declare and call a DLL routine.
Q: How to declare a DLL with a C Char datatype?
A: ByVal variable As Byte
Declare Function Publicname Lib "libname" [Alias "alias"] [Arguments List]
As Type
Empty value ByVal 0&, vbNullString
Char ByVal a As Byte
Asciiz String ByVal as String
There are 2 deferent DLL from 2 vendors and the DLL have the same name.
What must you do to be able to call both functions?
A. modify function name in one
B. declare public in separate module use the alias keyword to
C. declare private rename one function *
D. Use the alias keyword to rename one function *
We obtained many DLL functions from different vendors. Two functions happen
to have the same name but different purposes. What can we do?
A. Using an alias *
B. Declaring each Private in separate modules *
C. Registering one with another name
D. Modifying the DLL function.
Pass argument contain address of a Vb subroutine named MyProc to a MicWind
HPL
A. Aressof := MyProc
B. Adressof Me.MyProc
C. Adressof MyProc *
D. Adressof (MyProc)
Which code will create a new instance of object named Form1 in Project1?
A. Dim Frmx As Form1
B. Dim Frmx As New Form1 *
C. Set Frmx = Form1
D. Set Frmx = GetObject("Project1.Form1")
How many instances of class1 after running exist after the following code?
Dim a As Class1
Dim b As new Class1
b.MyProperty = 3
Set a = new Class1
A. 0
B. 1
C. 2 *
D. 3
In which case is a new object created? set x=new form1
Which Option will not allow to create instances : set Public to FALSE
Create an Automation server that exposes objects, properties, methods, and
events.
Q: The differences between early binding vs. late binding
•A: Late binding occurs when the compiler does not know about an object
until run time.
Early binding occurs when Visual Basic knows at compile time exactly which
interface will be used with an object variable.
Which two required for Early Binding?
A. Type library *
B. Dual Interface
C. New Keyword *
D. CreateObject Function
For Early Binding
Dim Varnaem as Class
Set varname = CreateObject(ClassName)
Create and use an ActiveX control.
•Declare and raise events.
How to raise an event?
First to declare it, use the Event keyword, then Raise it.
e.g. RaiseEvent ABC (arguments)
How Project Groups can be used when debugging ActiveX controls(lots of Qs).
Ambient & Extender
What is the property of a container that can be used to change the
background color of the control on the container when the background color
of the container changes?
A. Ambient *
B. Extender
C. Appearance
D. Property Pages
How do you create a license package file containing the licensing
information for all controls on a Web page?
A. With the Visual Basic License Manager.
B. With the CODEBASE parameter of an HTML page'stag.
C. With the Visual Basic Application Wizard.
D. With a utility from the LPK_TOOL directory on the Visual Basic CDROM. *
Q: How to add a control to a web page?
A: By scripting
You want to minimize download time for an ActiveX document with several
components. How package within a .cab file?
In a single .cab file
One .cab with ActiveX document. And a second .cab with referenced components
One .cab with ActiveX document and an INF file that points to individual cab
files for each component. *
One .cab with ActiveX document, an INF file that points to a .cab file with
the referenced components
Q: How to reduce the time for downloading on Internet an ActiveX component?
A: Create separate secondary .cab files ???
Users may already have these secondary .cab files on the system or the
secondary .cab files can be downloaded from Microsoft's web site.
Which two project types can contain an ActiveX Document?
A. Standard EXE
B. ActiveX Document EXE *
C. ActiveX Document DLL *
D. ActiveX Control
Q: What project types can have ActiveX documents?
A: All that can be a container
Q: How to convert an ActiveX.DLL to multithread?
A: Make it ActiveX. EXE
Q:Advantages of Using ActiveX Documents (Choose 2).
Q: What elements of ActiveX Components on a Web page contribute to security?
•A: When you use ActiveX controls on a Web page, you can implement the
following security measures:
•Set the appropriate level of security in Internet Explorer
•Provide users with information about the author of the control
•Through digital codesigning
•Create an Internet download by marking your Controls as safe for
scripting and initialization
Which project template would you select to build an in-process code
(ActiveX Document DLL)?
Hyperlink object
Which 2 actions may disqualify a component for being marked as safe for
scripting?
A. the component creates a password
B. the component writes information to a file
C. the component inserts data in registry *
D. the component reads information from registry *
Q: There is a www server application that uses ActiveX controls you developed
. When the application page is browsed with IE it does not show the ActiveX
control. What may be happening?
A1: No Internet download license file on the web server
A2: Options in the Application Setup Wizard were not used correctly
What ActiveX can do on WWW?
A. create licensing files
B. digital signing
C. register your control on a user’s computer *
D. modifying the users internet security settings
If you want to offer an option in a help menu for users to access your Web
Site, what ActiveX Document should you use?
A. Automation
B. WinSock
C. Hyperlink *
D. ActiveX component
You have an ActiveX document that uses the AsyncRead method to obtain data
from an intranet location. What type of data does it cannot return directly?
A. Files
B. Byte arrays
C. Pictures
D. Hyperlinks *
What is the purpose of the ID parameter in an HTML tag?
A. Specifies a URL that points to a file containing an implementation of an
object.
B. Specifies the object's unique class identifier stored in the system
registry.
C. Specifies a URL that points to the name of the object.
D. Specifies the object name. *
An ActiveX component connects to a database, the connection to the database
fails. What to do?
A. Create an error event
B. Set err object to false
C. Call raise method of the err object *
D. Create a prop name connected that returns false
Q: An error occurs in a component that you wrote, how to notify client:
A: Err.Raise number
Which property of the Err object returns the name of the object that
generated an Error?
A. Description
B. Source *
C. Number
D. Helpcontext
Q: Which code segment would best trap a "division by zero" error handling?
A: For example: (See Error Handling)
•Public Sub ProcDivZero()
On Error GoTo ErrTrapper
X = 100 / 0
Exit Sub
End Sub
ErrTrapper:
If Err.Number = 11 Then Debug.Print "Division by Zero Found"
End Sub
When the following code executes. What will the user see?
•Public Sub MyTest()
On Error GoTo ErrHandler
Dim X as Integer
MyProc(X)
MsgBox "XXX"
Errhandler:
MsgBox "YYY"
End Sub
Public Sub MyProc(X As Integer)
On Error GoTo MyprocErr
X = X / 0
MyprocErr:
MsgBox "ZZZ"
End Sub
a) "XXX" Only
b) "ZZZ" Only
c) "XXX", "ZZZ" and "YYY" Only *
d) "XXX" and "ZZZ" Only
Q: What will be shown when this code is executed?
Private Sub Command1_Click()
Command2.Value = True
End Sub
Private Sub Command2_Click()
•Command1.Value = True
End Sub
A: OUt of Stack Space error
Q: What will happen if user presses command2?
Sub Mysub()
•Static intNum As Integer
If intNum <= 4 Then
•Exit Sub
Else
•
•intNum = intNum + 1
Mysub
End If
End Sub
Private Sub Command2_Click()
•Mysub
End Sub
A: The code will run OK
Implement Help features in an application.
You want to use the ShowHelp method to display specific Help file pages for
your application without declaring a dll. Which object?
A. App
B. Menu
C. MenuLine
D. CommonDialog *
Before you use the ShowHelp method, you must set the HelpFile and
HelpCommand properties of the CommonDialog control to one of their
appropriate constants or values. Otherwise, Winhlp32.exe doesn't display
the Help file.
CommonDialog1.ShowHelp
HelpcontextID set to 0 for an option Button in a Frame, what will happen
when press F1?
A. Help conexts page is displayed
B. HelpContextID property of form is evaluated
C. HelpContextID property of the frame is evaluated *
D. Context help for the Option Button control is displayed.
Form’s HelpContextId is searched for non-zero value and if so, help is
displayed for the Form
If HelpContextID is set to 0, then Visual Basic looks in the HelpContextID
of the object's container, and then that object's container, and so on.
If a nonzero current context number can't be found, the F1 key is ignored.
Debugging and Testing Issues
•
•
Select appropriate compiler options.
•
•List and describe options for optimizing when compiling to native code.
•List and describe the differences between compiling to p-code and
compiling to native code.
What code will have the most to gain on to be compiled to Native Code?
A. Code that uses windows API
B. Code that has much String functions
C. Code that manipulates objects
D. Code that have complex Financial calculations *
Your application relies on arguments that are passed by reference. Which
two native code compilation options should you select to optimize the
performance of numeric processing?
A. Assume no Aliasing
B. Optimize for small code
C. Remove VB floating point error checks *
D. Remove Safe Pentium FDIV checks *
You are creating an application that is intended to run on only PentiumPro
based servers. You want to maximize the performance of this application.
Which compiler option should you use?
A. Assuming no Aliasing
B. Optimize for small code
C. Create symbolic debug information
D. Remove safe for Pentium FDIV checks *
You want the code written for debugging should not be compiled. How will
you accomplish this?
A. Use If .. Then .. Else Statements
B. Use the Err Object
C. Use conditional compilation *
Which element can you use in a conditional compilation directive?
A. Public variable
B. Public constant
C. Literal expression *
D. Undefined constant
Creating an application that uses conditional compilation to enable and
disable elements of functionality, which two mechanisms can you use to set
conditional compilation constants?
A. Dim statement
B. Constant statement
C. #Constant directive *
D. Project property dialog box *
Q: Where do you define conditional compiling variables?
A: Command line
Project Properties dialog box (under the Make tab)
In code
Conditional compiling could be used to:
1.designing an application to run on different platforms
2.changing the date and currency display filters
3.Remove debug code
What expression is acceptable for #const Only literal and their operation
except Is
•
•
Set watch expressions during program execution.
Q: When can you add watch variables?
A: In Break and design mode
Two advantages of using the context options in the Add watch dialog box are.
A. Allow multiple projects scope
B. Allow faster evaluation of expressions by narrowing content (of context) *
C. Increase number of break mode options
D. Viewing variables that have the same name but different scope *
Sets the scope of variables watched in the expression. Use if you have
variables of the same name with different scope. You can also restrict the
scope of variables in watch expressions to a specific procedure or to a
specific form or module, or you can have it apply to the entire application
by selecting All Procedures and All Modules. Visual Basic can evaluate a
variable in a narrow context more quickly.
Monitor the values of expressions and variables by using the debugging
windows.
Which variable does the local window show? (select 2)
A. All variables within a module
B. All variables within your Application
C. All variables within the Current procedure *
D. All object variables within the current scope *
Which task(s) can you perform by using the locals window
A. Edit the call stack
B. Define new variables
C. View and change expressions
D. View and change variables of the current procedure *
Which three task can you perform by using the immediate window in break mode?
A. declaring a variable as object
B. declaring a function
C. executing a function *
D. executing the call stack
E. view the value of the variable *
F. changing the value of the variable *
Immediate window: A control structure is valid only if it can be completely
expressed on one line of code, use colons to separate the statements.
You want to find out when a variable changes to a new value. Which tool would
you use?
- Watch window
You are observing variable1 in Procedure1 in the Locals Window. Suddenly the
Locals Window displays that the variable is "Out of Context" when it enters
Procedure2. How was variable1 declared?
A. As a Public in a standard Module
B. As a Private variable in Procedure1 *
C.As a Private variable in Procedure2
D. As a Private variable in the General Section of the Form
You want to test the Unload behavior of an In-Process component.
What should you do?
A. Start another instance of the development environment and create a test
project that references the component.
B. Create a project group that contains both a test project and the component
*
C. Add debug statements to the DLL component
D. Call the free library function in the MS Windows API
A control to be used by all programmers in a company. You need debug control:
interaction with the same process as one of your applications. How to do?
A. add control project to your app project *
B. load control project in second instance
C. in the app proj add a reference to control project
D. in the control proj add a reference to app project
•Q: What is the difference between debugging an ActiveX control project and
an in-process component?
A: The component code can run while the client is in Design mode
•Q: When testing a UserControl, you add a standard.exe to your project group.
UserControl in the Toolbox is dimmed. What should you do?
A: Close the UserControl designer and then test again
What should you do to debug an out of process component?
A. Start a second instance of the development environment *
B. Compile the component by using symbolic debug information
C. Create an error handler for the out of process component
D. Create a project group
Define the scope of a watch variable.
How to view contents of the Variant?
A. Use Debug.print *
B. Use Object browser
C. Look at the Locals window *
D. Copy to Clipboard
Create a setup program that installs and registers ActiveX controls.
Manage the Windows system registry.
pplication-specific information in the registry. •Register components
by using the Regsvr32.exe utility. •Register components by using the Remote
Automation Connection Manager. •Edit the registry manually. •Register a
component automatically.
Save settings?
A. local_Machine
B. current_User *
C. Current_Config
D. Classes_Root
IIS can not instantiate an object provided by the DLL (ActiveX) What should
you do to the DLL?
A. Digital Sign it
B. Mark as safe for initialize
C. Mark as safe for scripting
D. Register by Regsvr32 utility *
If you want to install your Visual Basic application in other computer, how
do you find out about the components that are registered in that computer?
REGSRV32.EXE
Q: How to use Regsvr32.exe to install ActiveX DLL, EXE, OCX?
A: To install ActiveX.dll - Regsvr32 dllname
To install Activex.Exe - AX_exename /Regserver
MSDN Deploying ActiveX Controls on the Web with the Internet Component
Download
DeSigning Controls for Use with HTML
Which task can you accomplish by packaging in .cab file?
A. creating license file
B. digital sign it
C. register on users computer *
D. modifying users internet security settings
Q: What cannot be done when an Internet Control is packaged. (Choose Two)
A: Write to a file
Read from the registry
Q: How can you build ActiveX components for Internet distribution?
A: Use the Application Setup Wizard and pick the appropriate options
Q: What type of files does the Setup Wizard generates for Internet download
setup? *.CAB files.
------------------------------------------------------------------------
Q: Which function can the Setup Wizard of the Enterprise Edition of VB 5
perform in addition to installing your ActiveX EXE project?
A: install your project as an ActiveX shared component
Q: What does locales show in different contexts?
A: In Visual Basic, many functions use the user's system locale, which uses
the Control Panel settings provided by the operating system to automatically
determine the conventions at run time. These functions are called
What is the event trigger sequence? Initialize, Load, Resize, Activate,
Paint
How to add the column to a ListView? MyListView.ColumnHeaders.Add ,,
"MyNewCol"
A unique feature of the Report view is ColumnHeader objects. The ListView
control contains a collection of ColumnHeader objects in the ColumnHeaders
collection.
For which control does the ImageList control act as a central repository of
images? ListImage
An ImageList control contains a collection of ListImage objects, each of
which can be referred to by its index or key.
Set pnlX = StatusBar1.Panels.Add() ' Add a new Panel object.
Set pnlX.Picture = ImageList1.ListImages(1).Picture ' Setting Picture must
use set.
What Property will you use to access BUTTONS of TOOLBAR? Key & Index
StatusBar1.Style property allows the display of common data such as date,
time, etc.
Insert text to Statusbar SB1 Second panel- SB1.panels(2).text = "text"
Your application has just deleted a record from a dynaset-type Recordset.
What is the current record? The delete record.
Which properties of the data control can be changed at run time? Recordset,
databasename, recordsource
The data in the currently selected row can be accessed using the Bookmark
property, which provides access to the underlying Recordset object’s current
record.
Which type of recordset you will use to populate country names into a
istBox? Forward-only
Which recordset you will use to find a record in multi-user environment?
Dynaset
recordset.{FindFirst | FindLast | FindNext | FindPrevious} criteria .
criteria likes the WHERE clause.
Which two project types can contain an ActiveX Document? ActiveX Dll,
ActiveX Exe.
What project types can have ActiveX documents? - All that can be a container
How to convert an ActiveX.DLL to multithread? - Make it ActiveX. EXE
Advantages of Using ActiveX Documents - Support for the Hyperlink object and
AsyncRead method
Which project template would you select to build an in-process code
(ActiveX Document DLL)?
The AsyncRead method initiates an asynchronous download.
Datatypes to be downloaded: files, pictures, byte arrays
Which 2 actions may disqualify a component for being marked as safe for
scripting? inserts in/reads from registry
ID parameter in an HTML tag specifies the object name.
When an error occurs in a component, call Err.Raise number.
Err.Source returns the name of the object that generated an Error.
Command1_Click() AND Command2_Click() call each other - Out of Stack Space
error
Before you use the CommonDialog.ShowHelp method, you must set the HelpFile
and HelpCommand properties.
If HelpContextID is set to 0, then Visual Basic looks in the HelpContextID
of the object's container.
Financial calculations will have the most to gain on to be compiled to
Native Code.
Optimize the numeric processing performance - Remove VB - Remove FDIV
Literal expression can be used in a conditional compilation directive.
How to set conditional compilation constants - #Constant directive,
Project property dialog box
When can you add watch variables? - In Break and design mode
You can restrict the scope of variables in watch expressions to a specific
context. Visual Basic can evaluate a variable in a narrow context more
quickly.
Locals window - View and change variables of the current procedure
Immediate window - executing a function, view or change ariable
Test behavior of an In-Process component - Create a project group
Debug an out of process component - Start a second instance of IDE
Save settings in – Hkey_current_User
Find out about the components that are registered in that computer -
REGSRV32.EXE
To install ActiveX.dll - Regsvr32 dllname
To install Activex.Exe - AX_exename /Regserver
Which task can you accomplish by packaging in .cab file? register on users
computer
Q: There is a www server application that uses ActiveX controls you
developed. When the application page is browsed with IE it does not show
the ActiveX control. What may be happening?
A1: No Internet download license file on the web server
A2: Options in the Application Setup Wizard were not used correctly
Q: Where do you define conditional compiling variables?
Command line
•Q: Difference between debugging an ActiveX control project and an
in-process component

vb questions 9

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Debug windows
Immediate window
•Automatically opens in Break-mode
•To evaluate any executable statement
•To find and change the value of variables and properties.
•To Query or changethe value of a variable while running an application.
Watch Window
•Add Watch : In Break or Design Mode from the Debug Menu
•You can watch the expression, breaking when the value of the watch
expression is true or breaking when the value changes
•It shows the current watch expression
•The context column indicates the
procedure module(s) in which each watch expression is Evaluated
•You can edit a value
Locals Window
•Automatically displays all of the declared variables in the current
procedure scope and their values.
Calls Stack lists all active procedure calls in the Application that where
started but not completed. You can only display the Call stack window when
the application is in break mode.
q: You have two text boxes Text1 and Text2. the Tab index of text1 is set to
0. what will happen when u set the tab index of text2 to 0?
A: Tab index of text1 is set to 1
Which code fragment is proper use of the Forms collections?
A. Dim form1 As Form *
For each form1 in Forms
MsgBox form1.Caption
Next Form1
B. Dim form1 As Form
For each form1 in Forms
MsgBox Forms.Item(form1).caption
Next Form1
C. Dim form1 As Form
For each form1 in forms
Msgbox form1.remove
Next Form1
D. Dim form1 As Form
For each form1 in Forms
Msgbox form1.add()
Next Form1
Which property is only valid for a collection object?
A. UBOUND
B. LBOUND
C. Count *
D. Index
What are the benefits of Forms collection?
- Allows faster unloading of all forms in the project *
- Faster access
- Standardized mechanism for tracking multiple instances of a form *
- Group forms & drag the group
Default firing order of events of a form?
A. Load, Initialize, Resize, Paint
B. Load, Initialize, Paint, Resize
C. Initialize, Load, Resize, Paint *
D. Initialize, Load, Paint, Resize
Start from Main, contain form1, Form1.caption = "blah". Which events will be triggered?
A. load
B. initialize
C. initialize, load *
D. initialize, load, activate
•How do you dynamically load controls : Load object_name
Q: What is the sequence in which the events in the form will trigger
A: Initialize, Load, Resize, Activate, Paint
Dim x As Integer
What event gets fired? Initialize
-----------------------------------------------------------------------
Which control can you place directly on an MDI-Form?
- Image
– Richtext Box
– Picture Box *
- Hscrollbar
- Option Control
- Frame
The PictureBox, Data controls, Timer controls and Menu controls are the only
standard Visual Basic controls that you can place in the internal area of an
MDI form.
Form1 contains a command button control that has code in one of its events.
To cut the control from form1 and than paste the control onto form2.
Where is the event located?
A. It is in the same event of the command button control of form2
B. It is in a different event of the command button control on form2
C. It is deleted when the command button control is cut from form1
D. It is in the General object procedures of form1 *
ProgressBar with visible property set true. To display progress of a lengthy
operation in you application. Which property will you set?
A. value *
B. width
C. max
D. index
DragOver Form1 to change color of label1
A. Target.color = true
B. Source.color = true *
C. DragLabel.color = true
D. DragControl.color = true
Form1 allow dragging Label1. Which line code use in DragOver event of Form1
to change bg color of Label1 to red?
A. Target.BC = vbRed
B. Source= vbRed *
C. DragLabel= vbRed
D. DragControl= vbRed
Which OleDragOver event parameter indicates dragging onto or away from a
target object?
A. effect
B. state *
C. index
D. data
Copy picture from picturebox control to other app which prop use?
A. oledropMode of the picturebox control
B. oledropMode of the form containing pictureBox control
C. oledragMode of the picturebox control *
D. oledragMode of the form containing pictureBox control
You want to trap a function key in a textbox. - Use the Keydown event.
A textbox to allow only numeric entries. - Use the Keypress event.
Form1 and Form2 place code in the Terminate event of Form1. Which code to
add in order to cause the Terminate event of Form1 to occur from Form2?
A. F1.Click unload F1
B. F1.hide F1.close
C. unload F1 set F1=nothing *
D. unload F1 end
You have a Label1 on an UserControl1, what event for Label1 to be stretched
during design time?
A. UserControl_Initialize
B. UserControl_Resize
C. Label1_Initialize
D. Label1_Resize *
Q: You have a Label Control in USERCONTROL. If the user resizes the
usercontrol during run-time, in which event will u handle the resizing of the
label (so as to view the Label control)?
A: USERCONTROL_RESIZE
How do you find out if F2 is being pressed?
A. Click
B. Validate
C. KeyDown *
D. KeyPressed
Your form contains a command button control named Command1. The index
property of command1 is set to 0. You want to load a second instance of the
command button that has its index property set to
1. Which line should you use?
A. load command1.1
B. load command1(1) *
C. load command1.index = 1
D. load command1.index (1)
Combine menu controls of object1 with the existing menu on form1
A. form1.NegotiateMenu = true *
B. form1.NegotiatePosition = true
C. object1.NegotiateMenu = true
D. object1.NegotiatePosition = true
Using the NegotiateMenus property, you determine if the menu bar of a form
will share (or negotiate) space with the menus of an active object on the
form.If you uncheck the Visible property for a menu item, the menu items
below will move up to fill the empty space.
How to attribute Access Keys to menus? &Save
What can you do with a dynamic menu?
A. You can add function keys to it
B. You can add pop-up menus to it *
C. You can deleted it after creating it *
D. You can create it from the Menu Editor
How to allow menu items to be added at runtime?
A. redimension the menu control array
B. use the add method *//dynamic menu
C. use the load statement
D. set up the menu with blank spaces initially and change at runtime
Q: How will you allow users to edit your control at design time?
A: Set the EditAtDesignTime property of your UserControl object to True.
Q: How do you make your UserControl Object Invisible at run-time?
A: Set the InvisibleAtRuntime property of the UserControl object to True.
Menu control: Which property can only be changed during design time?
- visible
- caption
- checked
- shortcut *
How to refer to the contents of the child of the selected node of a TreeView?
Set nodChild = TreeView1.Nodes(TreeView1.SelectedItem.Index).Child
•tvwMyTree.Nodes(10).Children ‘ return the number of children
tvwMyTree.Nodes(10).Parent.Text ‘ return the Text of Parent
Display Icon for each item in the hierarchy of the website?
A. Outline
B. Listbox
C. Listview
D. Treeview *
A TreeView control displays a hierarchical list of Node objects, each of
which consists of a label and an optional bitmap. A TreeView is typically
used to display the headings in a document, the entries in an index, the
files and directories on a disk, or any other kind of information that might
usefully be displayed as a hierarchy.
You are writing code for a Drag and Drop operation. You want to set the
DropHighLight property to highlight the target TreeView control element?
A. HitTest *
B. Drag
C. TextHeight
D. StartlabelEdit
The DropHighlight property is typically used in combination with the HitTest
method in drag-and-drop operations for TreeView and ListView Controls.
You use the add method of the TreeView control, which parameter can you use
to control the creation of a child node?
A. Key
B. Text
C. Relative *
D. Relationship
How to add the column to a ListView?
MyListView.ColumnHeaders.Add ,, "MyNewCol"
A unique feature of the Report view is ColumnHeader objects.
The ListView control contains a collection of ColumnHeader objects in the
ColumnHeaders collection.
What properties can you set while using the Add property for a list view?
•ColumnHeader object.Add(index, key, text, width, alignment, icon)
•Provide controls with images by using the ImageList control.
For which control does the ImageList control act as a central repository of
images? ListImage
An ImageList control contains a collection of ListImage objects, each of
Which can be referred to by its index or key.
Dim pnlX As Panel
Set pnlX = StatusBar1.Panels.Add() ' Add a new Panel object.
Set pnlX.Picture = ImageList1.ListImages(1).Picture ' Setting Picture must
use set.
TreeView1.ImageList = ImageList1 ' Specify ImageList
TreeView1.Nodes(3).Image = 1 ' Use Index property of ImageList1.
TreeView1.Nodes(3).Image = "image 1" ' or Use the Key property "image 1."
What Property will you use to access BUTTONS of TOOLBAR?
Key & Index
Which StatusBar property allows the display of common data such as date, time
etc?
A. Text
B. Style *
C. Object
D. SimpleText
Statusbar SB1 Second panel set key property to panel2
Which display the message "blah" in second panel
A. SB1.(2)Text = ..
B. SB1.panels(2).text = .. *
C. SB1.Panels.(panel2).text = ..
D. SB1.PanelItems("panel2").text = ..
If you intend to add a user control or any ActiveX control to your form,
you must either add the control to the Toolbox, or add its License key to
the Licenses collection.
•Option Explicit
Private WithEvents extCtl As VBControlExtender
Private Sub Form_Load()
Licenses.Add "project1.WeeksCtl", "xydsfasfjewfe"
Set extCtl = Form1.Controls.Add("project1.WeeksCtl", "ctl1")
extCtl.Visible = True ' The control is invisible by default.
End Sub
Q: When should you use public variables instead of property procedures for
read-write properties?
A: The property is a String data type, and there is no constrain on the size
or value of the string.
Correctly use of ParamArray keyword?
- At the end of the (……. As….. , ……As ……, Param Array )
- And not in combination with the Optional keyword
You have a variable x. You use the Watch window to see the contents of x. At one time the value of x=100 and the next step is says. It has occurred when the 1 process was finished and the second process was started. How was x declared?
A. Local to 1st procedure *
B. Local to 2end procedure
C. Public in a procedure
D. Public in the General declaration section of the form
Procedure in class module visible to the project not to other application
A. private function Report1 as bool
B. private function Report1() as bool
C. public function Report1() as bool
D. friend function Report1() as bool *
A variable is declared as Public in a form. From where can the Variable be
referenced?
A. Only from other procedures in the same form.
B. Only from forms in the same project
C. From anywhere in the same project *
D. From modules in other project
Which elements are supported in the definition of property procedures
- optional argument *
- address of operator
- alias keyword
- paramArray keyword *
You want a procedure to be visible only to objects in the current project.
You want that this procedure should be accessible by external clients.
How will you declare the Procedure?
A. Private
B. Friend
C. Public
D. Static
How can you create a read-only property Private and a write-only property
Public. Which of the following are true?
•A. Private Property Get Name() As String *
Name = txtname.text
End Property
Public Property Let Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
End Property
B. Public Property Set Name() As String
•Name = txtname.text
End Property
Private Property Let Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
End Property
C. Public Property Let Name() As String
Name = txtname.text
End Property
Public Property Set Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
End Property
You have to indicate the property changes for an object.
Which of the following is best suited for the above scenario?
A. Property Get
B. property Let
C. Public Sub() *
D. Public Function()
How can you create a read-only property for a class?
A. Define a Property Get procedure and define a Property Let procedure with
no arguments.
B. Define a Property Get procedure and a Property Let procedure.
C. Define a Property Get procedure without a Property Set or Property Let
procedure. *
D. Define a Property Set or Property Let procedure without a Property Get
procedure.
How can you create a read-only property?
A. Omit the Property Let procedure *
B. Omit the Property Set procedure
C. Set its ReadOnly property to true
D. Use the Private keyword when declaring the procedure
What are the two restrictions on how the Implements statement can be used?
A. It requires a reference to a type Library *
B. It can be used only once in an application
C. It cannot be used in standard module *
D. It cannot be placed in the general declaration section of a module
Q: What is the purpose of the Implements keyword?
•A: The Implements keyword is used to create a secondary interface.
For instance, if your application has a reference to a type library that
describes the IGrowth interface, you could create a secondary interface in a
class module using "Implements IGrowth".
You want to create an instance of an ActiveX component that can Asynchronously
signal projects that use it. What should you create? (Choose two)
A. an event
B. an object callback *
C. the Addressof Operator *
D. the Implements statement
Which type of Instancing should you use for the class module?
A. private
B. multiUse
C. GlobalMultiUse *
D. PublicNotCreatable
Sink the events of class1. How define a variable MyVar
A. Dim MyVar as object
B. Dim MyVar as Variant
C. Dim MyVar as new Class1
D. Dim WithEvents my as class1 *
Q: Where and why to use Friend methods and properties
A: The combination of public to classes in the same project and private to
the external.
You have a Data Control with Bound Controls.
You want to provide the ability to abort changes in the record currently
being edited and to refresh the bound controls. How?
Only invoke the UpdateControls method for the Data control.
UpdateRecord Updates database (recordset) with data from bound controls.
UpdateControls Updates database (recordset) changes to bound controls.
Refresh Creates a new recordset based on data control properties.
Update Update recordset with data from bound controls or through code.
Your application has just deleted a record from a dynaset-type Recordset.
What is the current record? The delete record.
Which properties of the data control can be changed at run time?
Recordset, databasename, recordsource
•Q: A list-box is used as a constituent control. The design window is closed
and the control inserted on a form in another project. The user then sets the
sort property of the control which in turn sets the sort property of the
control. Why does the error occur?
A: Compile the control project ?
U have Form,a FRAME & ListBox inside frame. If u set SORT property of Listbox
at design time, what will happen.
•box.List(index)
box.RemoveItem index
box.AddItem item[, index]
DBGrid is a collection of Column objects.
the DBGrid control depends on two other objects:
•The Recordset object of the data control
•The Columns collection of the DBGrid itself
Each cell of a DBGrid control can hold text values, but not linked or
embedded objects.
•Add a data control to a new form, and set its DatabaseName and RecordSource
properties to the database and table you want to display.
•Add a DBGrid control to the form, and set its DataSource property to the
data control you just created. The DBGrid column headers set automatically
from a Data control's Recordset object.
Q: How to set properties for the individual Column objects?
A: You must make the DBGrid control UI-active: Select the right mouse button,
and choose Edit. Then use pop-up menu.
Q: How to remove column header?
A: object.ColumnHeaders = False
Q: How to refer a colmun?
A: object.ColIndex [= value]
This property returns the zero-based index of a column within the Columns
collection.
Q: How to check the value of a specific field in the current record?
A: MyString = Data1.Recordset.Fields("Title").Value
The data in the currently selected row can be accessed using the Bookmark
property, which provides access to the underlying Recordset object’s current
record.
You have 2 tables based upon which reports are to be generated by making use
of a common Field. The existing Table structure and Report definitions should
not be changed. Which of the following is most appropriate.
A. create a new table and use Filter
B. Create a new table and use Sort
C. create a new Dynaset using Filter*
Which type of recordset you will use to populate country names into a
ListBox? Forward-only Which recordset you will use to find a record in
multi-user environment? Dynaset
To locate specific records you can use the Find methods with dynaset- and
snapshot-type Recordset objects, and the Seek method with table-type
The Seek method works only with table type recordsets, because Visual Basic
uses the table’s current index
•table.Seek comparison, key1, key2 ...

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Class Module

Property procedures
Property Get - Returns the value of a property.
Property Let - Sets the value of a property. – Let x = 3
Property Set - Sets the value of an object property. – Set objThing = New
Thing
•Property procedures are public by default. •The Property Get declaration
must use arguments with the same name and data type and less one number as
the arguments in the Property Let procedure. •The data type of the
final argument in a Property Set declaration must be either an object type or
a Variant.

••To create a read-only property, simply omit the Property Let or (for object

properties) the Property Set.

Event

An object that raises events is called an event source. To handle the events
raised by an event source, you can declare a variable of the object's class
using the WithEvents keyword. WithEvents variables must be module-level
variables.
•
•Option Explicit

Private WithEvents mWidget As Widget

Limitations on WithEvents Variables
••A WithEvents variable cannot be a generic object variable. That is, you
cannot declare it As Object.

•You cannot declare a WithEvents variable As New. •You cannot declare
WithEvents variables in a standard module. •You cannot create arrays of
WithEvents variables.

Inside Class module, use Public Event … RaiseEvent… pair. Events are always
Public.

DragOver event determines what happens after dragging is initiated and before
a control drops onto a target. This event occurs only if OLEDropMode is set
to 1 (Manual).

Private Sub Form_DragOver(source As Control, x As Single, y As Single, _

state As Integer)

Source - The control being dragged.

State - The transition state of the control being dragged in relation to a
target form or control. 0: enter, 1: leave, 2: over.

Private Sub object_OLEDragOver(data As DataObject, effect As Long, button _

As Integer, shift As Integer, x As Single, y As Single, state As Integer)

Moving DataObject (not Control) from one control or application to another.

KeyDown and KeyUp events occur when the user presses (KeyDown) or releases
(KeyUp) a key while an object has the focus. (To interpret ANSI characters,
use the KeyPress event.)

Polymorphism

VB supports Interface inheritance by two steps:

1.
1.2.Define interfaces – a class module by adding methods without code.
3.Define Child class using keyword Implements, then implement all the
properties and methods of parent interface.

Option Explicit

Implements Animal

Private Sub Animal_Move(ByVal Distance As Double)

Debug.Print "Flea moved"

End Sub

VB doesn’t support aggregation.

Component Programming

To declare an object variable for an object not defined in a type library

Dim objAny As Object

The main difference between declaring a variable of a specific class and
declaring a variable of the generic Object class is in how ActiveX binds
the variable to the object. When you declare a variable of the generic
Object class, ActiveX must use late binding. When you declare an object
variable of a specific class, ActiveX uses early binding, which can speed
object references.

Assigning an Object reference

If the ActiveX component supplies a type library, using NEW

If not, using

Set objectvariable = CreateObject("progID", ["servername"])

Or Set objectvariable = GetObject([pathname] [, progID])

For example:

Dim xlApp As Object

Set xlApp = CreateObject("Excel.Application") ‘late binding

Dim wdApp As Word.Application

Set wdApp = GetObject("", "Word.Application")

Set X = GetObject(, "MySrvr.Application")

X references an existing Application object.

Dependent objects are lower in an object hierarchy, and they can be accessed
only by using a method of an externally creatable object. Defined by Class
Instancing property - PublicNotCreatable.

Data associated with an embedded object is not persistent; that is, when a
form containing an OLE container control is closed, any changes to the data
associated with that control are lost. To save updated data from an object to
a file, you use the OLE container control's SaveToFile method.

Private Sub cmdSaveObject_Click ()

Dim FileNum as Integer ' Get file number.

FileNum = FreeFile ' Open file to be saved.

Open "TEST.OLE" For Binary As #FileNum ' Save the file.

oleObj1.SaveToFile FileNum ' Close the file.

Close #FileNum

End Sub

If the object is linked, then only the link information and an image of the
data is saved to the specified file. The object's data is maintained by the
application that created the object. If a user wants to save changes to a
linked file, the user must choose the Save command from the ActiveX
component's File menu because the SaveToFile method applies only to
embedded objects.

Asynchronous notifications and implementation

A client makes a method call and tells the component it wants to be
notified when certain things happen. Then the client can be free to do
other things while it’s waiting for component notification. Two
implementations: An event is like an anonymous broadcast, while a call-back
is like a handshake 4.Using events – RaiseEvent - WithEvents

Using Call-back

Test ActiveX Component

To test a component, you need to create a client application.
If you’re creating components as part of an application, you can use the
application itself as the test program. The test project must be an Exe
project. To test call-backs, use an ActiveX Exe project.

To test In-process server:

5.Create a Project Group containing the component and test project. 6.Set
test project as active project and make a reference to the component. ( not
necessary for ActiveX control)

7.Add code to test the properties and methods of each public class provided
by your component.

To test Out-of-process server:
••Make Component executable. •Ctrl+F5 to run component
project. You cannot add a reference to the component project unless it’s in
run mode.

•Open a second instance of the Visual Basic development environment.
•Start a new test project and make a reference to the component. •Add code
to test the properties and methods of each public class provided by your
component.

The difference between debugging controls and debugging other objects is
that some of the code in your control must execute while the testing form is
in design mode. To put a control into a state such that its code can execute
at design time, you must close the control's visual designer to enable the
control's icon in the Toolbox.

Software Distribution

Three ways to start the Package and Deployment Wizard:
1.
1.
1.In your application project, start from Add-In 2.Run it as a stand-alone
component from outside IDE. 3.Start it in silent mode by launching it from a
command prompt. Unattended with script.

•PDCmdLn.exe C:\Project1\Project1.vbp /p "Internet Package" /d Deployment1

/l "C:\Project1\SilentMode.log"

Signing and licensing must be done outside of the packaging process.

A dependency (.dep) file contains information about the run-time requirements
of an application or component. In Visual Basic, dependency information is
stored in files generated by the Package and Deployment Wizard or created
manually by you.
•Component Dependency File: A .dep file lists all the files required by a
particular component. When you purchase or use a component from a vendor,
you receive a .dep file from them. •The VB6dep.ini file provides the Package and Deployment Wizard with an all-purpose list of dependencies and references used by Visual Basic. This list is created when you install Visual Basic and resides in the \Wizards\PDWizard subdirectory of the main Visual Basic directory.

For a standard package, the information from the .dep files is written to a
Setup.lst file that is stored outside the packaged .cab file. For an
Internet package, the .dep file information is written to an .inf file that
is stored within the packaged .cab file.

The Setup Toolkit is a project installed with Visual Basic that is used by
the Package and Deployment Wizard when it creates a setup program,
setup1.exe. By default, the Setup Toolkit uses the \Program Files
directory as the root location. When installing a file on the
user's machine, you should not copy an older version of the file over a new
version.

The Setup.lst file describes all the files that must be installed on the
user's machine for your application and contains crucial information for the
setup process.

Internet Distribution

The Setup Wizard will create a .cab file, known as the primary .cab file,
which contains:
•The project components, such as the ActiveX control, ActiveX DLL, or
ActiveX EXE •The .inf file, which contains links to other .cab files that
contain Visual Basic support files and controls, as well as other
information, such as whether the control is safe for scripting and safe for
initialization and registry information as defined by the user. This file
replaces the Setup.lst file that the Setup Wizard creates in the standard
setup. •Reserved space for digital signatures. •All files that are not in
other (secondary) .cab files. Secondary .Cab Files: For ActiveX control
projects, ActiveX EXEs, and ActiveX DLLs, all run-time components such as
Msvbvm50.dll, individual controls, Data Access Objects (DAO), and Remote
Data Objects (RDO) are packaged into separate .cab files, digitally signed
by Microsoft, and placed on the Microsoft Web site. You can choose to link
your files to the .cab files on the Microsoft Web site, or you can download
local copies of them.

When you compile a ActiveX control with licensing support. The .VBL file
will contain licensing info(use the "Requiere License"Key option, located
in the General tab of the Project Properties dialog box.)

Only an ActiveX control can be used with the Create Download Setup option
in the Setup Wizard.

ActiveX documents use the NavigateTo method to get to URL Adresses on WWW.
The ActiveX document must be in a hyperling-aware containter and in a
container that maintains a history of documents to use the "goBack"
and "goForward" methods to move between previously visited documents.

Advantages of Using ActiveX Documents:
••Support for the Hyperlink object •Support for the AsyncRead method

The benefit of using secondary .cab files from a Web site are:

You do not need to distribute all of the .cab files required by your
application. The only file you need to distribute is the primary .cab file.
The .inf file within the primary .cab file points to the Microsoft Web site
and downloads the necessary .cab files based on the needs of the end user.
They provide an efficient means of delivering updates to your product.
If you cannot or do not want your application setup to require a connection
to the Internet, you may place the secondary .cab files on a ser<

vb questions 7

2008-07-17T19:58:00.000-07:00

1) If your user wants to uninstall the application you developed, which
method will you use to make it easy for him
a) Use setup wizard (*)
b) Customize the Setup.exe
2) If you have a progress bar. what propertry would you use to show its
status.
a) Index
b) Value(*)
3) What error do you get if the following code is executed
Private Command1_Click()
Command2.Value = TRUE
End sub
Private Command2_Click()
Command1.Value = TRUE
End sub
Ans : Stack Overflow error
4) How do you create a Public read only and Private Read/Write. The options
were something like
a) Public Get Name()
Name = stname
End
Private Let Name( stname as string)
stname = Name
End
b) Public Get Name()
Public Let Name()
c) Private Get Name()
Private Set Name()
d) Public Get Name()
Private Set Name()
5) When a user browses a web page which has a control you developed and the
browser displays a warning. what will you ask your user to do.
Ans : Ask the user to set his browsers security level to none or zero.
6) What event would you use if a user presses F2
7) A ListBox is in a frame. The HelpContextId of the ListBox is set to 0.
When the user presses F1 and the ListBox has focus What happens.
8) If you have a number of controls to distribute over the Web. How would you
decrease the download time for the user.
9) When the following code executes. What will the user see
Public Sub MyTest()
On Error GoTo ErrHandler
Dim X as Integer
MyProc(X)
MsgBox "XXX"
Errhandler:
MsgBox "YYY"
End Sub
Public Sub MyProc()
On Error GoTo MyprocErr
X = X / 0
MyprocErr:
MsgBox "ZZZ"
End Sub
a) "XXX" Only
b) "ZZZ" Only
c) "XXX", "ZZZ" and "YYY" Only
d) "XXX" and "ZZZ" Only
10) When you are testing your user control. you add a standard exe to your
project group. But the user control in your tool bar is dommed. What should
you do?
11) Which code would you use to create a instance of Form1
a) Dim Frmx as Form1
b) Dim Frmx as New Form1
c) Dim Form1 as Form
d) Set Frmx = GetObject("Project1.Form1")
12) How would you display text in a status bar which has its 2nd panel key
as"Panel2"
a) Statusbar1.Panel2.Text = "Printing ..."
b) Statusbar1.Panel(2).Text = "Printing ..."
c) StatusBar1.Panel("Panel2") = "Printing ..."
1 . Use Regsvr32.exe to install Active X DLL, EXE, OCX.
To install ActiveX.dll: Regsvr32 dllname
To install Activex.Exe: AX_exename /Regserver
------------------------------------------------------------------------
2 Test Activex.EXE (out-of-process) component
2 instances of VB
Test Activex.DLL (in-process) component
Add Standard.EXE and use 1 instance of VB
Debug ActiveX control project
Run Active x control while the client is in design mode
------------------------------------------------------------------------
1)When testing a User Control, you add a standard.exe to your project group.
User control in the Toolbox is dimmed. What should you do? Close the User
Control designer and then test again.
------------------------------------------------------------------------
4 Advantages of using Watch window:
-----------------------------------------------------------------------
5 What can be viewed in the local window?
All the variables in the procedure scope
------------------------------------------------------------------------
6 Immediate Window:
view, add, change and declare variables and see the result being returned.
------------------------------------------------------------------------
7 What Call stack shows?
------------------------------------------------------------------------
8 Why the context property in Immediate window is useful?
-----------------------------------------------------------------------
9 Autoredraw = False only affects line, pset, cicle created at run-time, not
design time. Use Refresh instead of Autoredraw to save system resources.
------------------------------------------------------------------------
10 DropHighlight used for drag-and-drop operation on a TreeView and
DropHightlight goes with HitTest in an OLE dragDrop operation
------------------------------------------------------------------------
11 ActiveXDocument.Hyperlink.Helpfile
Use Hyperlink object on ActiveX Document, needs a hyperlink-aware container,
e.g. IE4
------------------------------------------------------------------------
12 Property procedures e.g. Public Property Get ABC (ByVal... ByRef...
Optional...ParamArry intNum) Those in parantgese are optional argument types.
------------------------------------------------------------------------
13 How to declare DLL functions:
------------------------------------------------------------------------
14 AsynRead method is used to do asynchronous download. Datatypes to be
downloaded: files, pictures, byte arrays
------------------------------------------------------------------------
15 Implements as keyword used in a class module - used for Automation
Implements ABCDE
'ABCDE is a secondary interface created based on the type library's abstract
interface. How to do it? Set reference to the type library
What should be the syntax using Implements keyword?
-----------------------------------------------------------------------
16 Disadvantage of using Implements keyword:
Can only be used in Standard module;
Need to declare all the public variables, etc.
------------------------------------------------------------------------
17 LockEdits = False
Optimistic locking, the record (2k page) be locked when you use the method
update
LockEdits = True
Pessimistic locking, the record (2k page) will be locked when you use the
method Edit
Get familiar with different situations using LockEdits and understand it.
------------------------------------------------------------------------
18 Create private property - read only
Private Property Get ABC (no Property Let nor Property Set)
Create public property - write only
Public Property Let
PropertyChanged "BBB"
------------------------------------------------------------------------
19 What can be placed on MDI form?
Picturebox control (not image control)
timer control, Data control, Menu control
------------------------------------------------------------------------
20 Public variable declared in a form
Scope : entire application, make reference to form name if necessary
------------------------------------------------------------------------
21 Data control's default Recordset type: dynaset-type recordset
------------------------------------------------------------------------
22 HelpContextId = 0 is the default. If the HelpContextId of a botton control is set to zero, the container, i.e. frame or form's HelpContextId will be used. If there are no HelpContextID specified in the container, then NO HELP.
------------------------------------------------------------------------
23 CommonDialog1.ShowHelp
This requires : CommonDialog1.HelpFile to be set
CommonDialog1.HelpCommand to be set
maybe a reference to CommonDialog1.HelpKey
------------------------------------------------------------------------
24 Change the BackColor of UserControl's label1
Use Ambient Properties
------------------------------------------------------------------------
25 In a DragOver event, how to change the backcolor of the label which is
being dragged over the target?
Source.BackColor = vbRed
------------------------------------------------------------------------
26 Active X files for internet distribution:
Inf file equivalent to Setup.lst file
Inf file contains references to files, support files
.cab file (contains ActiveX.dll or .exe, inf file that is equ. to Setup.lst
file with links to support files, sec. cab files, space for digital signing)
.vbd file
.htm file
------------------------------------------------------------------------
27 How to reduce the time for downloading on Internet an Active X componet?
Create separate secondary .cab files.
Users may already have these secondary .cab files on the system or the
secondary .cab files can be downloaded from Microsoft's web site.
------------------------------------------------------------------------
28 StatusBar panels - is 1-based?
Get familiar with how to show a string in, for instance, the 2nd panel of a
statusbar.
------------------------------------------------------------------------
29 Toolbar
Properties: Button.Key and Button.Index
------------------------------------------------------------------------
30 What event will be fired when you move from one record to another in a
recordset?
Update
------------------------------------------------------------------------
31 How to Pass Null to DLL
ByVal as String
pass vbNullString
------------------------------------------------------------------------
32 Conditional Compilation
Can use literal statements except the IS operator
------------------------------------------------------------------------
33 Where do you define conditional compiling variables?
Command line
Project Properties dialog box (under the Make tab)
In code
------------------------------------------------------------------------
34 Dim x As Integer
What event gets fired? Initialize
-----------------------------------------------------------------------
35 How to convert an ActiveX.DLL to multithread?
Make it ActiveX. EXE
------------------------------------------------------------------------
36 How to raise an event"
first to declare it, use the Event keyword, then Raise it. e.g. RaiseEvent
ABC (arguments)
------------------------------------------------------------------------
37 How to add a control to a web page? By scripting
------------------------------------------------------------------------
38 Press F2, what event is fired? KeyDown
------------------------------------------------------------------------
39 What property of ProgressBar to show status? Value
------------------------------------------------------------------------
40 Under what situation will you have this error message "Out of Stack
space"?
------------------------------------------------------------------------
41 With TreeView control, use Add method to add a child node.
It goes with "Relationship" not "Relative", know the keyword tvwFirst,
vwLast, etc.

------------------------------------------------------------------------

42 Hyperlink object, GoForward and GoBack

Webrowser, GoHome and GoSearch

------------------------------------------------------------------------

43 How to pass Null pointer to a C function that is expecting a character
type?

VB byte type?

------------------------------------------------------------------------

44 GlobalMultiuse

For ActiveX.DLL and ActiveX.EXE

Enable you to use the properties as if the component is an intrinsic
controls, there's no need to declare the variables, one instance of the
class created for multiple client use.

------------------------------------------------------------------------

45 DBGrid's column property is 0-based

------------------------------------------------------------------------

46 Dynaset and filter property

------------------------------------------------------------------------

47 Setup a standard.exe, VB5DEP.INI is the dependency file

------------------------------------------------------------------------

48 An error occurs in a component that you wrote, how to notify client:

Err.Raise number

------------------------------------------------------------------------

49 How to create a license package for ActiveX control licensing

Use LPK_Tool.exe

------------------------------------------------------------------------

50 How to dynamically create or remove controls?

Set up control arrays at design time, at run time, use Load and Unload
control statements.

e.g. Load ABC(index#)

e.g. Load mnuFile(2) for dynamic menu

------------------------------------------------------------------------

51 When can you add watch statements?

At design time or break mode.

------------------------------------------------------------------------

52 What property to set if you want both menus (from the object and from the
container) shown ?

NegotiageMenus on the container

------------------------------------------------------------------------

53 How do you implement a sink event of a class using a variable?

Visual Basic 6.0 Study Guide

Program Structure

A typical application consists of one or more modules: a form module for
each form in the application, optional standard modules for shared code,
and optional class modules. Each module contains one or more procedures that
contain the code: event procedures, Sub or Function procedures, and Property
procedures.

Startup Form can be set in Project Properties. Sub Main() can only be in a
standard module. To display a splash screen, use a Sub Main procedure as
startup object and use the Show method to display the form:

Private Sub Main()

frmSplash.Show ' Show the splash screen.

… ' Add startup procedures here.

frmMain.Show ' Show the main form and unload the splash screen.

Unload frmSplash

End Sub

Three ways to end an application:
Single Form

Multiple Forms

Private Sub cmdQuit_Click ()

Unload Me

End Sub

Private Sub Form_Unload (Cancel As Integer)

Dim i as integer

' Loop through the forms collection and unload

' each form.

For i = Forms.Count – 1 to 0 Step - 1

Unload Forms(i)

Next

End Sub

End statement

Ends an application immediately: no code after the End statement is executed,
and no further events occur. Object references will be freed, but if you
have defined your own classes, Visual Basic will not execute the Terminate
events of objects created from your classes.

Life Cycle of Visual Basic Forms

1.Created, but not loaded. (Initialize) This is the only state all forms
pass through. 2.Loaded, but not shown. (Load) Create Controls. Assign hWin,
hDC. 3.Shown.

(Resize) - Occurs when an object is first displayed or when the window state
of an object changes. (For example, a form is maximized, minimized, or
restored.)

(Activate) - Occurs when an object becomes the active window.

(Paint) - Occurs when part or all of an object is exposed after being moved
or enlarged, or after a window that was covering the object has been
moved. 4.Memory and resources completely reclaimed.

(QueryUnload) – Prompt user for saving.

(Unload) - Remove from Forms Collection. Module-level variables may still
exist.

The only way to release all memory and resources is to unload the form and
then set all references to Nothing. Set Form1 = Nothing

(Terminate)

Executing the End statement unloads all forms and sets all object variables
in your program to Nothing. However, this is a very abrupt way to terminate
program. None of the forms will get their QueryUnload, Unload, or Terminate
events, and objects created will not get their Terminate events. 5.Unloaded
and unreferenced while a control is still referenced.

Object Concept

Objects in Visual Basic are created from classes; thus an object is said to be an instance of a class. The class defines an object’s interfaces, whether the object is public, and under what circumstances it can be created. Descriptions of classes are stored in type libraries, and can be viewed with object browsers.

To use an object, you must keep a reference to it in an object variable. The type of binding determines the speed with which an object’s methods are accessed using the object variable. An object variable can be late bound (slowest), or early bound. Early-bound variables can be DispID bound or vtable bound (fastest).

A set of properties and methods is called an interface. The default interface of a Visual Basic object is a dual interface which supports all three forms of binding. If an object variable is strongly typed (that is, Dim … As classname), it will use the fastest form of binding.

Using Code Editor

In a form module, the list includes a general section, a section for the form itself, and a section for each control contained on the form. For a class module, the list includes a general section and a class section; for a standard module only a general section is shown.

Class modules list only the event procedures for the class itself — Initialize and Terminate. Standard modules don't list any event procedures, because a standard module doesn't support events.

Breaking and combining statements

Text1.Text = "Hello" : Red = 255 : Text1.BackColor = _

Red

Declaring Variables

Dim variablename [As type]

••Declaring a variable in the Declarations section of a form, standard, or class module, rather than within a procedure, makes the variable available to all the procedures in the module. •Declaring a variable using the Public keyword makes it available throughout your application. •Declaring a local variable using the Static keyword preserves its value even when a procedure ends.

Implicit Declaration - You don't have to declare a variable before using it.

Explicit Declaration - Using "Option Explicit"

•
•The Option Explicit statement operates on a per-module basis; it must be placed in the Declarations section of every form, standard, and class module for which you want Visual Basic to enforce explicit variable declarations. If you select Require Variable Declaration, Visual Basic inserts Option Explicit in all subsequent form, standard, and class modules, but does not add it to existing code. You must manually add Option Explicit to any existing modules within a proje<

Scoping Variables

Depending on how it is declared, a variable is scoped as either a procedure-level (local) or module-level variable.
Scope

Private

Public

Procedure-level

( Dim, Static )

Variables are private to the procedure in which they appear.

Not applicable. You cannot declare public variables within a procedure.

Module-level

( In Declaration Section )

Variables are private to the module in which they appear.

Variables are available to all modules.

Values in local variables declared with Static exist the entire time your application is running while variables declared with Dim exist only as long as the procedure is executing. At the module level, there is no difference between Private and Dim. You can't declare public variables within a procedure.

Static Function or Sub will make all the local variables in the procedure static regardless their declaration inside.

Constant has the same scope rule as variable does.

Friend members is suitable in the ActiveX components. Friend functions are not part of an object's interface. They can't be accessed by programs that use the component's objects. They're only visible to all the other objects within the component to allow safe internal communication within the component.

Because Friend members aren't part of an object's public interface, they can't be accessed late bound — that is, through variables declared As Object. To use Friend members, you must declare variables with early binding — that is, As classname.

The Friend keyword can only be used in class modules. However, Friend procedures can be accessed by procedures in any module of a project. A Friend procedure doesn't appear in the type library of its parent class, nor can a Friend procedure be late bound.

Friend makes the procedure visible throughout the project, but not to a controller of an instance of the object.

Name Conflicting and Resolving

The forms and controls can have the same name as a restricted keyword. To resolve conflict, using:
•
•MyForm.Loop.Visible = True ' Qualified with the form name.

[Loop].Visible = True ' Square brackets also work.

Within the form module, local variables with the same names as controls on the form shadow the controls.

To resolve conflict, using: a reference or keyword Me

Private Sub Form_Click ()

Dim Text1 ' Assume there is also a control on the form called Text1.

Text1 = "Variable" ' Variable shadows control.

Text1.Top = 0 ' This causes an error!

Me.Text1.Top = 0 ' Must qualify with Me to get

End Sub

A variable in the module cannot have the same name as any procedures or types defined in the module. It can, however, have the same name as public procedures, types, or variables defined in other modules. In this case, when the variable is accessed from another module, it must be qualified with the module name.

Constant Name is referenced in case of collision depends on which object library has the higher priority.

To resolve conflict, using: [libname.][modulename.]constname

Data types

Dim EmpName As String * 50

Fixed-length strings in standard modules can be declared as Public or Private. In forms and class modules, fixed-length strings must be declared Private. You can assign a string to a numeric variable if the string represents a numeric value.

The default value of Boolean variable is False.

Object variable is actual a 32-bit pointer referring to an object within an application or within some other application. Using the Set statement to refer to any actual object recognized by the application.
•
•Dim objDb As Object ‘or Database

Set objDb = OpenDatabase("c:\Vb5\Biblio.mdb")

By default, if you don't supply a data type, the variable is given the Variant data type. A Variant variable is capable of storing all system-defined types of data. You don't have to convert between these types of data if you assign them to a Variant variable; Visual Basic automatically performs any necessary conversion. For example:

Dim SomeValue ' Variant by default.

SomeValue = "17" ' "17" (a two-character string)

SomeValue = SomeValue - 15 ' numeric value 2

SomeValue = "U" & SomeValue ' "U2" (a two- character string)

••If you perform arithmetic operations on a Variant, the Variant must contain something that is a number. •If you are concatenating strings, use the & operator instead of the + operator. •Variants can contain three special values: Empty, Null, and Error.

•Empty is used to see if a value has ever been assigned to a created variable.

•Null is commonly used in database applications to indicate unknown or missing data. Null will propagate through expressions involving Variant variables. Variables are not set to Null unless you explicitly assign Null to them.

•Error is a special value used to indicate that an error condition has occurred in a procedure. Error values are created by converting real numbers to error values using the CVErr function.

Note: A variant always takes up 16 bytes, no matter what you store in it. Objects, strings, and arrays are not physically stored in the Variant; in these cases, four bytes of the Variant are used to hold either an object reference, or a pointer to the string or array. The actual data are stored elsewhere.

ParamArray
•It can only be used in as the final argument in an argument list. •It represents an optional array of variant Data type •It cannot be used with ByVal, ByRef or Optional keywords •It is used in these contexts:
••Declare Statement •Function Statement •Property Get Statement •Property Let Statement •Sub Statement

You create a user-defined type with the Type statement, which must be placed in the Declarations section of a module.

User-defined types are always passed by reference.
•
•Public Type udtAccount

Number As Long

Type As Byte

CustomerName As String

Balance As Double

End Type

Enumeration data type

Public Enum WorkDays

Saturday

Sunday = 0

Monday

Tuesday

Wednesday

Thursday

Friday

Invalid = -1

End Enum

Arrays

Dim Sums(20) As Double ' 21 elements. The default lower bound is 0.

Dim Counters(1 To 15) As Integer

Dim MultiD(3, 1 To 10, 1 To 15) 'multi-dimension

Dim DynArray() 'dynamic array

ReDim DynArray(4 to 12) 'is an executable statement, can appear only in a procedure

ReDim Preserve DynArray(UBound(DynArray) + 1) 'reserve the old values

•
•
•
•
•
•ReDim Preserve Matrix(UBound(Matrix, 1) + 1, 10) 'Error: Only the upper bound of the last 'dimension in a multidimensional array can be changed

You may want to use a collection instead of array if you're working with a small, dynamic set of items.

A Collection object stores each item in a Variant. A Collection object has three methods (add, item, remove) and one property (count). Collection are not polymorphic. Forms collection contains all of the currently loaded Visual Basic forms in the program. Collection class contains anything that can be stored in a Variant. Thus the Collection object can contain an object or an integer, but not a user-defined type.

control array

A group of controls that share a common name, type, and event procedures. Each control in an array has a unique index number that can be used to determine which control recognizes an event.

There are three ways to create a control array at design time:

Assign the same name to more than one control.

Copy an existing control and then paste it onto the form.

Set the control's Index property to a value that is not Null.

Note: You must create menu control arrays in the Menu Editor.

At run time, use:

Load Object(index%)

Unload Object(index%)

•The control must be created at design-time to be ready loaded at run-time. You can use the Unload statement to remove any control created with Load. However, you cannot use Unload to remove controls created at design time.

Procedure

Declaration Statement

[Public | Private] Declare Sub name Lib "libname" [Alias "aliasname"] [([arglist])]

[Public | Private] Declare Function name Lib "libname" [Alias "aliasname"] [([arglist])] [As type]

Sub procedures are by default Public in all modules, which means they can be called from anywhere in the application. There are two types of Sub procedures, general procedures and event procedures.

Sub ButtonManager(Button As Control) ‘general procedure, usually in bas. module

Private Sub cmdUp_Click() ‘event procedure

There are two ways to call a Sub procedure:

' Both of these statements call a Sub named MyProc.

Call MyProc (FirstArgument, SecondArgument)

MyProc FirstArgument, SecondArgument

Function has return value.

There are three ways to call a Function procedure:

X = functionForX

Call function(x) ‘will throw away return value

Function x ‘will throw away return value

Argument

Sub ListText(ByVal x As String, Optional y As _Integer = 12345)

Using the ParamArray keyword allows you to specify that a procedure will accept an arbitrary number of arguments.

ParamArray is used only as the last argument in arglist to indicate that the final argument is an Optional array of Variant elements. The ParamArray keyword allows you to provide an arbitrary number of arguments. The ParamArray keyword can't be used with ByVal, ByRef, or Optional.

Named argument for many built-in functions, statements, and methods:

Function ListText(strName As String, Optional strAddress As String)

List1.AddItem strName

List2.AddItem strAddress

End Sub

Private Sub Command1_Click()

ListText strAddress:="12345", strName:="Your Name" ‘in reverse order

End Sub

Control Structure

For Each element In group
statements

Next element

This is helpful if you don't know how many elements are in a collection.

••For collections, element can only be a Variant variable, a generic Object variable, or an object listed in the Object Browser. •For arrays, element can only be a Variant variable. •You cannot use For Each...Next with an array of user-defined types because a Variant cannot contain a user-defined type.

•Exit For … Exit Do … Exit Sub … Exit Function ‘exit control structure

Object

Properties that you can set and get at run time are called read-write properties. Properties you can only read at run time are called read-only properties.

There are some common cases in Visual Basic where one object contains other objects. Forms, Controls, Printers.

Three ways to refer a collection member:

Controls("List1")

Controls!List1

Controls(3)

You can use the Container property to change an object's container within a form.

The following controls can contain other controls:
••Frame control •Picture box control •Toolbar control (Professional and Enterprise editions only)

Menu

Each menu you create can include up to five levels of submenus. Ctrl+E: Menu Editor

A menu control array is a set of menu items on the same menu that share the same name and event procedures. Each menu control array element is identified by a unique index. Use a menu control array to:
••Create a new menu item at run time when it must be a member of a control array. For example, a menu control array may be used to store a list of recently opened files. •Simplify code, because common blocks of code can be used for all menu items.

Elements of a menu control array must be contiguous in the menu control list box and must be at the same level of indentation. When you're creating menu control arrays, be sure to include any separator bars that appear on the menu.

What is the restrictions of dynamically created menu items?

Cannot have shortcut keys

Cannot be used for a WindowList

Must be menu control array elements

Pop-up menu

Private Sub Form_MouseUp (Button As Integer, Shift As _

Integer, X As Single, Y As Single)

If Button = 2 Then ' Check if right mouse button was clicked.

PopupMenu mnuFile ' Display the File menu as a pop-up menu.

End If

End Sub

•Any code following a call to the PopupMenu method is not run until the user selects an item in the menu or cancels the menu. Only one pop-up menu can be displayed at a time. While a pop-up menu is displayed, calls to the PopupMenu method are ignored. Calls to the PopupMenu method are also ignored whenever a menu control is active.

Menu and toolbar negotiation will occur only for insertable objects that support in-place activation.

1.The NegotiateMenus property does not apply to MDI Forms. 2.The NegotiateToolbars property applies only to MDI forms.

There are three ways to set conditional compilation constants:
•Project Properties dialog box - Public to all modules in the project •Command line - Public to all modules in the project

•
•vb6.exe /make MyProj.vbp /d conFrenchVersion=–1:conANSI=0

••#Const statement in code - Private to the module in which they are declared.

•
•
•
•- Only conditional compiler constants and literals can be used in expression.

Conditional compilation can use literal statements except for IS operator.

visual basic questions 6

2008-07-17T19:57:00.000-07:00

1) When can you add a Watch? (2)
Design time
While code execution is suspended
Run time
Run time except during modal dialogue boxes
2) What are the advantages of using the context property when using the Watch
window?
3) An project MyProj has an object MyObj with a friend method called MySub.
How can MyObj be declared in order to allow access my sub?
as MyObj anywhere within MyProj
as MyObj from any project
as Object from anywhere within MyProj
as MyObj from any project with a reference to MyProj added
4) What are the advantages of using secondry .cab files?
5) Under what circumstances would compiling to native code instead of P code
give best results?
if the application does a lot of string manipulation
if the application is a financial application
if a lot of Win32 API calls are made
6) private sub command1_click
on error goto cmdErr:
Sub1
Msgbox "YY"
exit sub
cmdErr:
Msgbox "ZZ"
end sub
private sub Sub1
dim x as integer
on error goto subErr:
x = 10 / 0
exit sub
subErr:
Msgbox "XX"
end sub
What messages are displayed when user clicks on command1?
yy
xx
xx , yy
xx, yy, zz
7) What two types support ActiveDocuments?
standard.exe
ActiveX.dll
ActiveX.exe
AxtiveX control
8) How would you make a public read, private read/write property?
9) A status bar (sb1) has two panels, the second one with key name
'Panel2'. Which is correct?
sb1.Panel.Items('Panel2').Text = 'asdf'
sb1.Panels(2).Text = 'asf'
sb1.Panels.Index('Panel2').Text = 'adf'
10) If you want to drag a picture from a form, what property must be set?
11) Which control can be placed on an MDI Form
Picture
Image
Treeview
Button
12) What property must be used with TreeView's DropHighlight?
13) Which method provides the simplest way to FTP?
Internet control
webcontrol
winsock
Hyperlink
14) Which is the correct syntax:
AddressOf ("MySub")
AddressOf (MySub)
AddressOf MySub
AddressOf "MySub"
16) A UserControl contains a listbox control with the sorted property
exposed. Why do you get an error if the sorted property is set at design
time? (because listbox control does not have a propertybag and cannot be run
in design mode like the UserControl)
17) private sub main
Form1.Caption = "Hello"
end sub
what events on form1 get called?
Load,
Load, Activate
Initialise, Load
Initialise, Load, Activate
1. You have a command button Command1 with code for some event on Form1.
You select the command button, cut it from Form1 and paste it onto form2.
Now where is the code for the event of Command1?
[X] In the general section of Form1
[ ] In the general section of Form2
[ ] .....
[ ] .....
2. Which (2) of the following make an ActiveX scripting control unsafe
for www applications
[X] One that creates a password
[X] Save to a File
[ ] Get information from registry
[ ] Save information to registry.
3. You have developed an application which will run exclusively on a
Pentium Pro. What options will you select yo optimize numeric operations?
[ ] Assume No Aliasing
[ ] Optimizing for Small Code
[X] Disable Visual Basic Floating Point Error Checking
[X] Remove Safe Pentium FDIV Checks
4. You drag Label1 on Form1 and drop it on some control on Form1. What line
of code will change the background color of Label1 to red?
[ ] label1.backcolor = vbred
[ ] label1.color = vbRed
[X] Source.Backcolor = vbRed
[ ] .....
5. There is Form1 that has Object1. How can you combine the menu controls
of Object1 in Form1?
[ ] NegotiatePosition = True
[X] NegotiateMenus = True
[ ] ......
[ ] ......
6. You set a form with AutoRedraw = False. You have a command button, an
image control, a draw made by the PSET instruction, and a text that uses the
PRINT method. If the form is minimized and then restored, there are two
elements that are going to be dis
The Command Button and the Image Control
7. If you want to display a hierarchical structure of a Web Site, which of
the following controls you should use?
[ ] outline
[ ] listbox
[ ] listview
[X] treeView
8. If you want to offer an option in a help menu for users to access your
Web Site, what Component should you use?
[ ] Automation
[ ] WinSock
[X] Hyperlink
[ ] ActiveX component
9. If we have an ActiveX Component that connects to a database, how can the
client be notified if the component connection fails?
by raising events or Callbacks
oR
use Err.Raise Method in the Activex Component
10. You have an ActiveX document that uses the AsyncRead method to obtain
data from an intranet location. What type of data can it not return directly?
[ ] Files
[ ] Byte arrays
[ ] Pictures
[X] Hyperlinks
11. We obtained many DLL functions from different vendors. Two functions
happen to have the same name but different purposes. What can we do?
[X] Using an alias
[X] Declaring each Private in separate modules
[ ] Registering one with another name
[ ] Modifying the DLL function.
12. How do you declare an object variable so that it is able to sink events?
[ ] Dim MyVar AS OBJECT
[ ] Dim MyVar AS Variant
[ ] Dim MyVar AS New Class1
[X] Dim WithEvents MyVar as Class1
13. Which line of code will create a new instance of an object new Form1 in
Project1.
[ ] Dim Frmx as Form1
[ ] Dim Frmx as New Form1
[ ] Set Frmx = Form1
[X] Set Frmx = GetObject("Project1.Form1")
14. How do you pass a null function pointer to a DLL from VB?
Ans. Use the AddressOf Operator.
15. What object do you use for the ShowHelp method?
Use the CommonDialog Control
16. You want to minimize download time for an activeX document with several
components. How to package within a .cab file?
Ans.
17. IIS cannot instantiate an object provided by the DLL (ActiveX). What
should you do to the DLL?
Ans. Register the Activex DLL on the user's computer using "regsvr32.exe
18. You design a class for use all programmers in the company in a
project. You want users to be able to access the methods of the class
without creating a new instance of it. How will you do this?
[ ] Set the instancing property of the control to MultiUse
[X] Set the instancing property of the control to GlobalMultiUse
[ ] .............
[ ] .............
19. Which two required for Early Binding?
[X] Type library
[ ] Dual Interface
[X] New Keyword ?
[ ] CreateObject Function
20. What should you do to debug an out of process component
[X] Start a second instance of the development environment
[ ] Compile the component by using symbolic debug information
[ ] Create an errorhandler for the out of process component
[ ] Create a project group
21. What is the sequence in which the events in a form will trigger?
ILRAP Ó Initialize, Load, Resize , Activate, Paint
Note : When a Form is unloaded the sequence is ---> QueryUnload, Unload,
Terminate
22. How do you dynamically create a Commnad button . Already a Command
Button with index 0 exists.
Load Command1(1)
23. What will happen when this code is executed?
Private Sub Command1_Click()
command2.Value = True
End Sub
Private Sub Command2_Click()
Command1.Value = True
End Sub
Ans. An out of stack space error will be displayed.
24. What will happen if user presses command2?
Sub Mysub()
static intNum As Integer
If intNum <= 4 Then
Exit Sub
Else
intNum = intNum + 1
Mysub
End If
End Sub
Private Sub Command2_Click()
Mysub
End Sub
[X] The code will execute without errors
[ ] An out of stack space error will be diplayed
[ ] The Computer will hang
[ ] ......
25. How to declare a DLL with a C Char datatype?
ByVal variable As Byte
26. What elements can you use in Conditional Compiling?
Ans. Literal Expressions
27. What event can handle when a user presess F2
Ans. KeyDown or KeyUp
Note : Not KeyPress because this event can only handle ASCII Keys ie A-Z,
a-z, 0-9
28. You want your UserControl to reflect the BackColor of the Container. What
will you use?
ans. AmbientProperties.
29. Your application contains the following class names Class1 with a
property named Myproperty. You run the following code
Dim A as Class1
Dim B as New Class1
B.Myproperty = 3
Set A = New Class1
How many instances of class1 exist after your run this code.
[ ] 0
[ ] 1
[X] 2
[ ] 3
30. Which argument of the ADD method is used to specify a node object to
Treeview ?( say creation of a Child )?
[ ]Key
[ ]Relative
[X]Relationship
[ ] ..........
31. You have a Label Control in USERCONTROL . If the user resizes the
usercontrol during run-time , in which event will you handle the resizing of
the label (so as to view the Label control)?
Ans. USERCONTROL_RESIZE
32. U have a Option Button inside a Frame on a Form. The Option ButtonÆs
HelpContextId is 0. If the user presses the F1 key, what will happen?
Frame's HelpContextId is searched for non-zero value and if so, help is
displayed.
33. If a user sets the LockEdits property of the Table to False and another
user updates the Table at the same time. What error will be displayed?
Ans. An Error message will be displayed when another tries to UPDATE a
record in the same page.
34. You have to indicate the property changes for an object. Which of the
following is best suited for the above scenario?
[ ] Property Get
[ ] property Let
[X] Public Sub()
[ ] Public Function()
35. U have 2 tables based upon which reports r to be generated by making use
of a common Field.
The existing Table structure and Report definitions should not be changed.
Which of the following is most appropriate.
[ ] create a new table and use Filter
[ ] Create a new table and use Sort
[X] create a new Dynaset using Filter
[ ] ......
36. How to create File option on menu with a Hot Key ALT F?
Ans. Set Caption to "&File" in Menu for that item
37. How do you pass a null pointer to a DLL?
Ans. Use vbNullString if you have declared the function to accept a string
argument OR
Declare the function to accept a long data type and tehn pass "0&" without
the quotes.
38. What files are generated by an internet component download setup?
Ans. A .cab file (component file and a .inf file) and a sample .htm file.
A directory called support is also generated which contains the component
file and also a .inf file.
39. A user complains that your control doesn't get downloaded saying that
Internet Explorer displays a message that it is unsafe for downloading the
control. What is the solution?
Ans. Ask the user to reduce his/her security settings until the error message
does not appear.
40. How will you allow users to edit your control at design time?
Ans. Set the EditAtDesignTime property of your UserControl object to True.
41. How do you make your User Control Object Invisible at run-time?
Ans. Set the InvisibleAtRuntime property of the UserControl object to True.
42. You are implementing Drag and Drop with a treeview control. What will you use in conjunction with DropHighlight?
Ans. HitTest
43. What property of the ProgressBar control specifies the current position?
[ ] Index
[X] Value
[ ] Range
[ ].....
44. How can you create a read-only property?
[X] Omit the Property Let procedure
[ ] Omit the Property Set procedure
[ ] Set its ReadOnly property to true
[ ] Use the Private keyword when declaring the procedure
45. You want a procedure to be visible only to objects in the current project
You want that this procedure should be accessible by external clients.
How will you declare the Procedure?
[ ] Private
[ ] Friend
[ ] Public
[ ] Static
46. You are observing variable1 in Procedure1 in the Locals Window.
Suddenly the Locals Window displays that the variable is "Out of Context"
when it enters Procedure2. How was variable1 declared?
[ ] As a Public in a standard Module
[X] As a Private variable in Procedure1
[ ] As a Private variable in Procedure2
[ ] As a Private variable in the General Section of the Form
47. You want that the code written for debugging should not be compiled.
How will you accomplish this?
[ ] Use If .. Then .. Else Staetments
[ ] Use the Err Object
[X] Use conditional compilation
[ ] .............
48. What is the advantage of specifying "Context" in the Watch Window?
1. You can add a watch to variables with the same name having different
scope
49. What can you do with menus created at run-time?
1. Create popup-manus with it
2. Delete the menus after using them
50. What controls can you place on an MDI Form?
Ans. The PictureBox and the Timer Controls
51. Which StatusBar property allows the display of common data such as date,
time etc?
[ ] Text
[X] Style
[ ] Object
[ ] SimpleText

visual basic questions

2008-07-17T19:56:00.000-07:00

1. If you want to display a hierarchical structure of a web site,Which is
the following control you should use?
(a) Outline
(b) Listbox
(c) Listview
(d) Treeview (Correct)
2. One question is something like, If varient variable of object changes and
you want to moniter the changes when the variable changes.How to do that?
(Choose 2)
(a) Debug.Print(Correct)
(b) Object browser
(c) Local(Correct)
3.If you want to offer an option in a help menu for users to access your Web
Site,what Compononent should you use?
(a) Automation
(b) Hyperlink (Correct)
(c) Winsock
(d) Activex compononet
4.You have devoloped an application which will run exclusively on a Pentium
Pro.What options will you select to optimize numeric operations? (Choose 2)
(a) Assume no Aliasing
(b) Optimize for Small Code
(c) Disable Visual Basic Floating Point Error Checking (Correct)
(d) Remove Safe Pentium FDIV Checks (Correct)
5. Which line of code will create a new instance of an object new Form1 in
project1.
(a)Dim Frmx as Form1
(b)Dim Frmx as New Form1
(c)Set Frmx = Form1
(d)Set Frmx = GetObject("Project1.Form1") (Correct)
6.Which line of code will create a new instance of form1.
(a) Dim Frmx as Form1
(b) Dim Frmx as New Form1
(c) Set Frmx = GetObject(,"Project1.Form1")
(d) Set Frmx = New Form1 (Correct)
7. What Object do you use for the ShowHelp method?
(a)App
(b) Ambient
(c) CommonDialog control (Correct)
8.Which two required for Early binding?
(a) Type library (Correct)
(b) Dual Interface
(c) New Keyword (Correct)
(d) CreateObject Function
9.You want to minimize download time for an activex document with several
components.How to Package within a .cab file?
(a) Put the component in .cab file and all the running compononent file in
secondary file
(b) digitally sign the component
(c) Put the .inf file in the primary .cab file points to the microsoft web
site.
**** See the Internet component download in Book on line
10.You drag Label on Form1 and drop it on some control on Form1.What line of
code will change the background color of Label1 to red?
(a)Label1.backColor = vbRed
(b)Source.BackColor = vbRed (Correct)
(c) Target.backColor = vbRed
11.You have a Form1 and command button.You put code in command button
event.You cut the command button from Form1 and paste it on Form2.What
happend to the code?
(a)It will be deleted
(b)It will be moved on form2
(c) It will be remained on General section of Form1 (Correct)
12. Which two of the following Will disqualify a safe Activex scripting
control for www applications?(Choose 2)
(a) One that creates Password
(b) Writes to the file
(c) Read Information from the registry
(d) Insert Information to the registry
13. What two arguements you can use for property procedures?
(a) param Array (Correct)
(b) Alias
(c)Address of
(d)Optional (Correct)
14.What Element you can use for Conditional compilation directive?
(a) Public Constant
(b)Private constant
(c) Literal Expression (correct0
15.In what order Form Fires?
(a)Load Initialize Resize Paint
(b) Load Initialize Paint Resize
(c) Initialize Load Resize Paint (Correct)
(d) Initialize Load Paint Resize
16.You have an ActiveX document that uses the AsyncRead Method to obtain
data from an intranet location.What type of data cannot be returned?
(a)Files
(b) Byte arrays
(c) Hyperlinks (Correct)
(d) Pictures
17.How to debug an out of process component?
(a) Start a second instance of the developing enviroment. (Correct)
(b)Create an error handler for the out of process component.
(c) Create project group.
18. You have command button Command1 with code in its click event:
Command2.Value = True
and a comman2 button with code in its click event
Comman1.Value = True.
What happens when this code executed?
(a) Over flow error
(b) Out of stack error (Correct)
19. What will happen when this code executed?
Sub MySub()
Static intNum as integer
If intNum <= 4 then
exit sub
Else
intNum = intNum + 1
MySub
End if
End Sub
(a) Syntax error Will be displayed
(b) Codel will be returned without error (Correct)
(c) the computer will hung
20.How to declare a Dll with a DWORD datatype?
ByVal as Long
21.What property you will use to change the background color for the
container?
(a) Ambient (Correct0
(b)Paint
(c)
21. Your application contains the following Class names Class1 with a
property named Myproperty.You run the following code
Dim A as Class1
Dim B as New Class1
B.Myproperty = 3
Set A = New Class1
How many instances of class1 exist after you run this code?
(a) 0
(b)1
(c)2 (Correct)
(d)3
22. See the proper syntax for the ParamArray Keyword.
23.Which arguement of the Add method is used to specify a node object to
Treeview?
(a)Key
(b)Relative
(c)Relationship (Correct)
24.All users have default Locks for database.You put the code
Data1.LockEdit = False.When try to chage the data in database what will
happen?
(a) Errror will return when you try to edit
(b) Error will return when you try to update
(c) The error will be something that data changed and operation stoped.
(Correct0
25.What event occours when you press F2?
(a) MouseUp
(b) KeyPress
(c)MouseDown
(d) KeyDown (correct)
26.You set a form with AutoRedraw = False.You have a command button,an image
control,You use Pset Method to draw on the form and a print method to Create
text.If the form minimized and then restored,what are redisplayed?
(a) Command button( correct)
(b) Image (bitmap) (correct)
(c)
27.What can you do with menus created dynamically?(Choose 2)
(a) Create Popup menus with it (correct)
(b) Remove the menu after using them (correct)
28. You want to create an instance on an ActiveX component that can
Asynchronouly signal projects that use it.what should you create?Choose2
(a) an event (Correct)
(b) an object Callback (correct)
(c)the address of operater
(d) Implements
29.We obtained many dll funcions from dirrerent vendors.Two functions happen
to have the same name but different purposes.What can you do? Choose 2
(a)Using an alias (Correct)
(b) Modifying the dll funcion
(c) Declaring each Private in separate modules. (Correct)
30.What control can you place on an MDI form? Choose 3
(a) Image
(b) Picture (Correct)
(c) Data access (Correct)
(d) Timer (Correct)
(e) Frame
31.You are using Graphics on your form.you don't want the picture to be
erased when you minimized.what should you do?
Set AutoRedraw property to true.
32.What can be viewed in the local window? Choose2
(a) Show the variables within the scope of the current procedure (Correct)
(b) All Object variables declared in the executing procedure.
33.To use Alt F for File menu what you should do?
(a) Use the menuEditor
(b) Put the Alt F in name section.
(c) Put the Caption in File &F (Correct)
34.You have a Label control in UserControl.If the User resizes the
UserControl during runtime in which event will you handle the resizing of
the Label?
(a) Label1_Resize
(b) Label1_Initialize
(c) UserControl_Resize (Correct)
35.You have a option button inside a Frame.The option button's Help
contextID is 0.If user presses F1 Key,what will happen ?
(a) Main help window will be displayed
(b) The help for the form will be displayed (correct)
(c) The help for option button will be displayed
36.How can you test the unload behaviour of an In Process Component?
(a) Add a second instance
(b) Add a project group with the test project and component and run in a
singe instance (Correct)
37.while running a web page, a user gets a warning about unsafe control and
the control does not get downloaded.what to do?
Tell the user to reduce the security level to zero or none.
38.You are writing code for a drag and drop operation.you want to set the
drop higlight the proper treeview control element.Which method should use to
do this?
Ans. HitTest
39.What are two restrictions on how the implements statement can be used?
choose 2
1) It requried a reference to a type library.
2) It cannot be used in standered module.
40.You want to obtain a reference to a specific Activex document to a
specific ActiveX document object that is currently loaded.This object is
handled by an activex document server that was created in microsoft visual
c++.Which line of code must you use to obtain a reference to the object.
Ans. Set MyObj = GetObject(Filename,3someapp.2SomeClass)
41.What's the database default recordset type?
(a) Dynaset Object
(b) Dynaset type recordset object (Correct)
(c) Table type
d) Snapshot type recordset object
42.You create a class module that will be used by other ptogrammers in your
company. You wnat the class module to function like an intrinsic feature of
the visual basic langrage.YOu do not want to require the programmers to write
code to create an instance of the class. which type of instancing should you
use for the class module.
(a) Private
(b) Multiuse
(c) GlobalMultiUse
(d) PublicNot Creatable (Correct)
44.Which of the following properties apply to an ambient properties?
(a) Front color
(b) UserMode correct
(c) back color correct
(d)Left to right
45.Which is the valid property of the form's collection?
Ans. Count
46.You are designing a component to generate run time errors.What would be
used?
Raise method on Err object.
47.You want the execution of your code to halt when variable changes.Which
tool to use?
Wach window
48.One question on DragOver
49.Which type of file is created when you use the setup wizard and choose
the create internet download setup option?
.Cab file
50.Show Help method used with which control
Ans. commonDialog control
51.One Question on progressbar.
52.One question on LateBinding
53.You have a form with textbox,Textbox1.You add a second
textbox,textbox2.How can you set the focus to textbox?
Ans. Textbox2.TabIndex = 0
Know withevent Variable
Know Regsvr32.exe to register all the components.
1) You want to late bind a class called employee in component called bus.
Correct code would be :-
a) dim classvar as object
classvar = new employee
b) dim classvar as employee
classvar = new employee
c) dim classvar as object (*)
classvar = createobject("bus.employee")
d) dim classvar as employee
classvar = createobject("bus.employee")
2) A DLL function is documented as follows
WINAPI DWORD Myfunc( char c )
how would you declare it in vb (only difference was in the parameters)
a) declare function myfunc( bval myarg as byte) alias "myfunc" as long (*)
b) declare function myfunc( bval myarg as string) alias "myfunc" as long
c) declare function myfunc( byref myarg as string) alias "myfunc" as long
d) declare function myfunc( bval myarg as string*1) alias "myfunc" as long
3) How do you test the unload behavior of an in-process component ?
a) starting different instances of VB
c) add a test project to the project group (*)
d) add debug statements
c) use the windows api unloaddll function or something like that
4) What is the correct usage of the parramarray keyword ?
( cant remember the exact options but they went this way )
a) sub mysub( arg1 as string, paramarray arg2, arg3 as string)
b) sub mysub( arg1 as string, optional arg2 as string, arg3 as paramarray)
c) sub mysub( arg1 as string, arg2 as string, bval arg3() as paramarray)
d) sub mysub( arg1 as string, arg2 as string, paramarray arg3 ) (*)
Things I remember noting were 1) position - where are parammaray args allowed
2) optional args allowed with paramarays ?
3) can paramarrays be passed byval ?
5) You create a multiuser application in which you set lockedits= false.
which error message are you likely to get ?
a) Couldnt save ; currently locked by user on machine (*)
b) data has changed ; operation stopped
c) couldnt update; currently locked by user on machine
6)You put a label on your user control. You want the label to change size
with the user control. Which event would you use ?
a) label1_resize
b) usercontrol1_resize (*)
c) label1_change
d) usercontrol1_change
7)A question that went - what does packaging your component in a cab also
allow you to do ?
digitally sign your component
8)A question on the best way to package your application for distribution
over the web?
The point is to minimize download time and the clue was that it uses many
components shipped with vb
a) in primary and secondary cab files
b) in a primary cab file and an inf file pointing to a secondary cab file
(*)
c) In a primary cab file and an inf file pointing to the cab files for the
components depended on
d) ??
9)You want to use debug statements but dont want to distribute them in the
end program.what do you do
(a) use conditional compilation (*)
10)You create a database application for your company. The tables are linked
and have a common transaction field. You now want to create new reports at
regional and headoffice level but dont want to change either the table
structures ar the report definitions.What do you do ?
a) use the filter property to create a new TABLE
b) use the sort property to create a new TABLE
c) use the filter property to create a new dynaset (*)
d) copy the records you want to another TABLE
11)You develop a component for use on a web page, but your users get a
warning about an unsafe control and the control does not get downloaded.
What do you do ?
a) use codebase
b) use licencing
c) set the user safety level to none
d) obtain a digital certificate for signing your component (*)
12)What is needed for early binding ? (choose 2)
a) type library (*)
b) new keyword
c) dual interface (*)
d) createobject function
13) Which types of files can be registerd with regsvr32
a) exe
b) dll (*)
14)A class in an object provided by DLL can not be instantiated by IIS what
do you do ?
a) register the dll using regsver32.exe (*)
15)You are creating a component that should be able to asynchronously notify
projects that use it. What would you use ?. (choose 2)
(a) Events (*)
(b) object callbacks (*)
(c) the address of operator
(d) Implements statement
16)Advantages of the context options in the watches window
17)Which object to use if you want to provide a menu option that links to
help on a web site ?
hyperlink ?
18)disadvantages of the implements keyword
a) cannot be used in a standard module (*)
b) cannot be used more than once in a module
d) cannot be used in the declaration section of a module
19)What you can do with dynamic menus (choose 2)
(cant remember options)
(a) assign them function keys
(b) add menu items to them (*)
(c) make items visible and invisble
20)Datacontrols default recordset type
a) dynaset object ( beware !)
b) table type recordset
c) dynaset type recordset (*)
21)What happens when f1 is pressed when the button does not have a
helpContextID but the containing frame does ?
22)CommonDialogs are a way to show help
23)Use of Ambient properties to make your usercontrol respond to the
background of the containing application
24)Using source.backcolor to change the backcolor of a label being dragged
over the target
25)The I LOVE RAP question (Initialize, Load, Resize, Activate, Paint form
events)
26)The use of treeview to show a hierachical view in a website
27)The use NegotiateMenus on the container to make an objects menu visible.
Options were
something like this :-
a) use the MenuNegotiate property of the container
b) use the MenuNegotiate property of the object
c) use the NegotiateMenus property of the container
d) use the NegotiateMenus property of the object
28)The use of the WithEvents keyword to declare an event sink for a class
named class1
i.e dim WithEvents MyVar as Class1
29)The Asyncread method cannot return hyperlinks directly
30)The use of Load command1(1) when command1 with an index of zero already
exists.
31)The use of the caption property to define hot keys in menus e.g
caption= "&File" defines alt+f as hotkey
32)The use of State in the dragover event to know whether the dragged
control is moving onto or away from your control.
3. There was question where you had to pick which code segment was right:
dim frm as form
for each frm in forms
msgbox frm.index.caption
next
dim frm as form
for each frm in forms
msgbox frm(index).caption.text
next
* dim frm as form
for each frm in forms
msgbox frm.caption
next
4. I got the "What is the best was to view a Web site's hierarchy..." use
Treeview
5. A question about lockedits. if recordset.lockedits=false, which would be
the most like to occur:
•update error: record locked on by •save error:
record locked on by •can not read database...
6. a logic question. What happens when:
sub mysub()
static x as integer
if y => 4 then
exit sub
else
y=y+1
mysub()
end if
end sub
7. I did the worst on app setup/distribution. A question was "A user says
your control can not be download. What do you suggest?"
•digitally sign your control •create a cab file •tell the user to set the
safety level in IE to none •??
8. Know the order of a form load: initialize, load, resize, activate, paint
9. Also autoredraw. If not set to true, graphics drawn with Pset or text on
the form printed used Print will disappear if another form is placed on top
then minimized.

vb Question 5

2008-07-17T19:55:00.000-07:00

DROPHIGHLIGHT property is for : HITTEST.

1.What r the steps involved in EarlyBinding, How do u create objects using
early binding.
2.Which keywords are allowable in compiler Directives statements :Literal
Statements & except IS Keyword.
3.While running a web page, a user gets a warning about unsafe control and
the control doesn't getdownloaded. Whats the solution ?
4.If you want to install your Visual Basic application in other computer, how
do you find out aboutthe components that are registered in that computer?
5.What type of files does the Setup Wizard generates for Internet download
setup?
6.Know all possible type of files that can you register by using REGSRV32.EXE
7.How can you test the unload behavior of an in-process (ActiveX) DLL
component?
8.How can you debug an (ActiveX) out-of-process component?
9.Variable a is in Procedure A. In the Locals Window we observe its current
value. Then you step into to Procedure B and variable a shows a message "out
of context". What does it mean?
10.Which (2) of the following make a safe ActiveX scripting control for www
applications
[ ] Prompt for a password
[ ] Save to a File
[X] Get information from registry
[X] Save information to registry.
11.What options (switches) should you select in order to optimize performance
for numeric processing while the compiler relies on arguments passed by
reference.
[ ] Assume No Aliasing
[ ] Optimizing for Small Code
[X] Disable Visual Basic Floating Point Error Checking
[X] Remove Safe Pentium FDIV Checks
12.You have Form1 where you drag and place a label named Label1. Pick the
correct line of code that changes the background color of Label1.
13.There is Form1 that has Object1. How can you combine the menu controls of
Object1 in Form1?
a)Using a pop-up menu at run-time. Another option could be to set the
NegociateMenu property of Form1 to true.
14.You set a form with AutoRedraw = False. You have a command button, an
image control, a draw made by the PSET instruction, and a text that uses the
PRINT method. If the form is minimized and then restored, there are two
elments that are going to be di splayed.
The Command Button and the Image Control
15.If you want to display a hierarchical structure of a Web Site, which of
the following controls you should use?
[ ] outline
[ ] listbox
[ ] listview
[X] treeView
16.What can you do with a dynamic menu?
[ ] You can add function keys to it
[X] You can add pop-up menus to it
[X] You can deleted it after creating it
[ ] You can create it from the MenuEditor
17.If you want to offer an option in a help menu for users to access your Web
Site, what ActiveXDocument should you use?
[ ] Automation
[ ] WinSock
[X] Hyperlink
[ ] ActiveX component
18.If we have an ActiveX Component that connects to a database, how can it be
notified if the component connection fails?
19.You have an ActiveX document that uses the AsyncRead method to obtain data
from an intranetlocation. What type of data does it cannot return directly?
[ ] Files
[ ] Byte arrays
[ ] Pictures
[x] Hyperlinks
20.We obtained many DLL functions from different vendors. Two functions
happen to have the same name but different purposes. What can we do?
[X] Using an alias
[X] Declaring each Private in separate modules
[ ] Registering one with another name
[ ] Modifying the DLL function.
21.One question related to sink events for a class named CLASS1 and some
possible answers like:
( ) Dim MyVar AS OBJECT
( ) Dim MyVar AS Variant
( ) Dim MyVar AS New Class1
( ) Dim WithEvents MyVar as Class1
22.Which line of code will create a new instance of an object new Form1 in
Project1.
[ ] Dim Frmx as Form1
[ ] Dim Frmx as New Form1
[ ] Set Frmx = Form1
[X] Set Frmx = GetObject("Project1.Form1")
23.What is the DBGrids default RecordSoruce type
24.What object do i use for the ShowHelp method?
25.You want to minimize download time for an activeX document with several
components. How to package within a .cab file?
26.IIS can not instantiate an object provided by the DLL (ActiveX) What
should you do to the DLL?
27.An ActiveX component connects to a database, the connection to the
database fails. What do?
28.There are 2 deferent dll from 2 vendors and the dll have the same name.
What must you do to be able to call both functions?
29.A control for use all programmers in company. You need debug control
interaction with the same process as one of your applications. How do this?
A. add control project to your app project
B. load control project in second instance
C. in the app proj add a reference to control project
D. in the control proj add a reference to app project
30.Which two required for Early Binding?
A. Type library *
B. Dual Interface
C. New Keyword *
D. CreateObject Function
31.What should you do to debug an out of process component
A. Start a second instance of the development environment *
B. Compile the component by using symbolic debug information
C. Create an errorhandler for the out of process component
D. Create a project group
32.What is the sequence in which the events in the form will trigger ILRAP
à Initialize, Load, Resize , Activate, Paint
33.How do you dynamically create a Commnad button . Already a Command Button
with index 0 exists.
Load Command1(1)
34.What vill be shown when this code is excuted?
Private Sub Command1_Click()
Command2.Value = True
End Sub
Private Sub Command2_Click()
Command1.Value = True
End Sub
Out of Stack Space error
35.What will happen if user presses command2?
Sub Mysub()
static intNum As Integer
If intNum <= 4 Then
Exit Sub
Else
intNum = intNum + 1
Mysub
End If
End Sub
Private Sub Command2_Click()
Mysub
End Sub
36.How to declare a DLL with a C Char datatype?
a) ByVal variable As Byte
37.How to use the Form collection?
Dim a As Form
For Each a In Forms
MsgBox a.Caption
Next
38.What elements exists in Conditional Compiling
a) Literal Expressions
39.What event can handle when a user presess F2
a)Key Down
40.You want your usercontrol to reflect the backcolor of the container what
do u use
a)Ambient.
41.Your application contains the following class names Class1 with a property
named Myproperty.
You run the following code
Dim A as Class1
Dim B as New Class1
B.Myproperty = 3
Set A = New Class1
42) How many instances of class1 exist after your run this code.
a. 0
b. 1
c. 2 (*)
d. 3
43.Which argument of the ADD method is used to specify a node object to
Treeview ?( say creation of a Child )?
Key
Relative
Relationship
43.You have a Label Control in USERCONTROL . If the user resizes the user
control during run-time , in which event will u handle the resizing of the
label ( so as to view the Label control)?
a)USERCONTROL_RESIZE
44.U have a Option Button inside a Frame . The Option Button’s HelpContextId
is 0. If user presses the F1 key, what will happen?
a)Form’s HelpContextId is searched for non-zero value and if so, help is
displayed for the Form
45.If a user sets the LOCKEDIT property of Table to FALSE and another user
updates the Table at the same time. What error will be displayed?
46.If an application is compiled specifically for running on Pentium Pro
Machines ,Which of thefollowing options have to be enabled?
[] Assume no aliasing
[] Floating point division Error
[] optimize for Pentium [tm]
[] Floating Point division by Zero Error
47.U have to indicate the property changes for an object. Which of the
following is best suited for the above scenario?
[] Property Get
[] property Let
[] Public Sub()
[] Public Function()
48.Which of the following is not supported by AsyncRead ?
[] Bitmaps
[] Files
[]
[] HyperLinks *
49.U have 2 tables based upon which reports r to be generated by making use
of a common Field.The existing Table structure and Report definitions should
not be changed.which of the following is most appropriate.
[] create a new table and use Filter
[] Create a new table and use Sort
[] create a new Dynaset using Filter*
[]
50.How to create File option on menu with a Hot Key ALT F?
a) Set Caption to "&File" in Menu for that item

some questons
*************

1. which property sets the value to indicate the display of a lengthy
operation?
a)Value
2)Dragover event of form1 to change bg color of label 1 to red/source.color
=vbred
3)Trap a function key
a)keydown
4)To allow numeric digit only ina txt box which is unbound?
a)keypress
5)Prpperty to access buttons of toolbar?
a)Key and Index
6) Inserting text to statusbar SBI second panel ?
a)sb1.panels(2).text = "....printing"
7)default recordset
a)dynaset type recordset
8)lokedits = false
a)optimistic locking
9)pass an empty valu
a)byval 0& byref vbnullstring
10)which 2 projects contain ActiveX documents
a)Active X.exe and activex.dll
11)activex.dll to multithread
a)activex.exe (convert)
12)when helpcontextid =0 for an object conatined in a frame where does visual
basic look for help?
a)In the controls container
13)what code will gain from being compiled as native code?
a)finacial calculations
14)what cannot be done when an internet control is packaged?
a)write from registry,reading from registry.
15)benefits of form collection
a)Standardised mechanism for for tracking multiple instances of a form
unloading all forms is faster.

Hints:

(a) Scope of Declarations, (Priv, Pub,Static,Global..etc)
(b) Use Collections (0 & 1) based.
(c) Debugging Issues (Local, Watch & Immediate) & their scopes.
(d) Design Issues ( Autoredraw when to set TRUE/FALSE, runtime & degign time
properties available, Using Graphic Methods like PSET..)
(e) Using CLASSES in VB: Develop a small class & try to implement practically the issues
: Inheritance (use AS NEW), Polymorhism (use IMPLEMENTS),Instanceing
(SingleUse,PubCreatble,Global,Multi etc.)
(f) Develop Small AX DLL,AX Control,AX EXE &AX DOC.Know diff Outof &inprocess.
(e) Concentrate of DAO (Locking Issues),Validation & Other Events.
(f) Design a form using Treeview Control,Listview & Imagelist control.If you
only C&P from the example from ONLINE Help, it is sufficient. U got know the
major events & Understand the methods & Properties.
(HIT TEST & DROP HIGHLIGHT PROPERTIES)

FEW QUESTION TOPICS THAT I COULD UNDELETE FROM MY RECYCLING BRAIN
DUMP.
1. U have Form,a FRAME & ListBox inside frame. If u set SORT property of
Listbox at design time,what will happen.Pls refer other Articles in the brain
dump for this Question.
2. What is the Only Poperty available for collection : Count.
3. Which Option will not allow to create instances : set Public to FALSE
4. How do u create a PUBLICLY READONLY property and PRIVATE READ/WRITE
Property.(Brilliant Question...Observe Public & Private).
5. Files The Get Generated while creating Internet Distribution files:
.CAB,.HTM & .INF.
6. DRAG DROP : What Does State Parameter of Mouse event Signifies.
7. What r the only design & Run time properties available for a Menu.
8. DROPHIGHLIGHT property is for : HITTEST.
9. How do u dynamicaly load controls : Load,Move,Visible.
10.How do set a text into 2nd panel of statusbars Panel Collection.
11.What Property will u use to access BUTTONS of TOOLBAR : Key & Index.
Note: Here Key can also be used to uniquely access buttons on toolbar
12.What r the steps involved in EarlyBinding, How do u create objects using
early binding.
13.If a variable is declared as PUBLIC in Forms Declaration what is its scope
: - Complete APP
- Only to procedures inside the form
- Procedures which r declared as public
- Procedures which r declared as PRIVATE.
14. One Question of Friend Property. It was pretty simple.
15. One Question on Pessimistic & Optimistic Locking.
16. Which type of recordset u will use to populate country names into a
listbox.
17. Which recordset u will use to find a record in multiuser environment
18. Which event will get fired when u move from 1 record to the other.
19. how do u pass NULL to a DLL: ByRef vbNullStrig, ByVal 0 as long
(or ByVal 0&)

1.Your application contains the following class names Class1 with a property
named Myproperty. You
run the following code:
Dim A as Class1
Dim B as New Class1
B.Myproperty = 3
Set A = New Class1
2)How many instances of class1 exist after your run this code.
a. 0
b. 1
c. 2 (*)
d. 3

2. You want to create an instance of an ActiveX component that can
Asynchronously signal projects that
use it. what should u create (Choose two)?
a. an event
b. an object callback (*)
c. the Addressof Operator (*)
d. the Implements statement
3.What control can u place on an MDI form.
a. Image (*)
b. Picture Box
c. Option Control
d. Frame
4.some question like u have two forms Form1 and Form 2 and u want to trigger
a terminate event for the first Form from the Second Form.
the correct answer is:
Unload Form1
Set Form1 = Nothing
5.The record set validate event is done only when.
a. when u move to the next control
b. Only when u move to the next record (*)
6.The Record Set record count only when u access all the records.
7. Scope of a public variable in a form
Accessable from all procedure and function in the Form.
8.What cannot be done when an Internet Control is packaged (Choose Two)?
Write to a file
read from the registry
9. Save settings
HK_CurrentUser
10.Code for Toolbar Click Event
Button.key
11.You have two text boxes Text1 and Text2. the Tab index of text1 is set to
0. what will happen when
u set the tab index of text2 to 0?
Tab index of text1 is set to 1
12. Arguements for property Procedures (Choose Two)?
AddressOf (*)
Alias
Param Array(*)
Optional
13.For Early Binding
Dim varname as Class
Set varname = CreateObject(ClassName)
14.To Show Help method witrhout declaring a DLL
First create a Common Dialog Control
15.To pass a null value to a DLL (Choose Two)
By Ref vbNullString
By Val long 0
16. How to debug an ActiveX control?
use the raise method
1.If you want to install your Visual Basic application in other computer, how
do you find out about the components that are registered in that
computer? REGSRV32.EXE
2.How can you build ActiveX components for Internet distribution? Use the
Application Setup Wizard and pick the appropriate options.
3.What type of files does the Setup Wizard generates for Internet download
setup? *.CAB files.
4.Know all elements shown in the Add Watch Window (Debugging)
5.Know all elements shown in the Locals Window (Debugging)
6.Know all possible type of files that can you register by using REGSRV32.EXE
. (i.e.: .DLL,.OCX, etc.)
7.How can you test the unload behavior of an in-process (ActiveX) DLL
component? You can add
a standard EXE project to the ActiveX DLL¦s project group, and test the
in-process component
within a single instance of Visual Basic.
8.How can you debug an (ActiveX) out-of-process component? To test an
ActiveX EXE, you must
run the component within one instance of Visual Basic, and run the test
application in a second
instance of Visual Basic.
9.Know all the options available within the "Compile" tab in the Project
Properties when making a
new project. (i.e.: Compile to Native Code -> Favor Pentium Pro (tm),
Advanced Optimizations
-> Remove Integer Overflow Checks, etc.)
10.Variable a is in Procedure A. In the Locals Window we observe its
current value. Then you step
into to Procedure B and variable a shows a message "out of context".
What does it mean?
Variable a was local to Procedure A (neither public nor static).
11.One question on conditional compilation to choose the right construct
(learn the syntax for #ifdef
#elseif #endif)
12.There is a www server application that uses ActiveX controls you
developed. When the
application page is browsed with IE it does not show the ActiveX
control. What may be
happening? Options in the Application Setup Wizard were not used
correctly.
13.Which (2) of the following make a safe ActiveX scripting control for
www applications

[ ] Prompt for a password
[ ] Save to a File
[X] Get information from registry
[X] Save information to registry.
14.What options (switches) should you select in order to optimize
performance for numeric
processing while the compiler relies on arguments passed by reference.

[ ] Assume No Aliasing
[ ] Optimizing for Small Code
[X] Disable Visual Basic Floating Point Error Checking
[X] Remove Safe Pentium FDIV Checks
15.You have Form1 where you drag and place a label named Label1. Pick the
correct line of code
that changes the background color of Label1.
16.There is Form1 that has Object1. How can you combine the menu controls
of Object1 in Form1?
Using a pop-up menu at run-time. Another option could be to set the
NegociateMenu property of
Form1 to true.
17.You set a form with AutoRedraw = False. You have a command button, an
image control, a draw
made by the PSET instruction, and a text that uses the PRINT method.
If the form is minimized
and then restored, there are two elements that are going to be di

The Command Button and the Image Control
18.If you want to display a hierarchical structure of a Web Site, which of
the following controls you
should use?

[ ] outline
[ ] listbox
[ ] listview
[X] treeView
19.What can you do with a dynamic menu?:

[ ] You can add function keys to it
[X] You can add pop-up menus to it
[X] You can deleted it after creating it
[ ] You can create it from the MenuEditor
20.Know the DropHighLight property of TreeView.

The DropHighLight property is used to do drag and drop operations in a
TreeView.
21.Characteristics of the DragOver Event.

Used for drag and drop operations with forms, and other objects as
pictures.
22.If you want to offer an option in a help menu for users to access your
Web Site, what ActiveX
Document should you use?:

[ ] Automation
[ ] WinSock
[X] Hyperlink
[ ] ActiveX component
23.Know the function and syntax of Param Array
24.Know all about how to implement HelpFiles in an application
25.If we have an ActiveX Component that connects to a database, how can it
be notified if the
component connection fails?
26.Know all about using class modules
27.Know how to declare DLL functions.
28.You have an ActiveX document that uses the AsyncRead method to obtain
data from an intranet
location. What type of data does it cannot return directly?

[ ] Files
[ ] Byte arrays
[ ] Pictures
[X] Hyperlinks
29.What is the purpose of the Implements keyword?

The Implements keyword is used to create a secondary interface. For
instance, if your application
has a reference to a type library that describes the IGrowth interface,
you could create a
secondary interface in a class module using "Implements IGrowth".
30.Why would you want to set the LockEdits property to False?

If LockEdits is set to False (for optimistic locking), then the 2K page
containing the record will
remain locked, and then updated upon executing the Update method only.
31.We obtained many DLL functions from different vendors. Two functions
happen to have the same
name but different purposes. What can we do?

[X] Using an alias
[X] Declaring each Private in separate modules
[ ] Registering one with another name
[ ] Modifying the DLL function.
32.Know the differences between early binding vs late binding

Late binding occurs when the compiler does not know about an object
until run time.
Early binding occurs when Visual Basic knows at compile time exactly
which interface will be used
with an object variable.
33.One question related to sink events for a class named CLASS1 and some
possible answers like:

( ) Dim MyVar AS OBJECT
( ) Dim MyVar AS Variant
( ) Dim MyVar AS New Class1
( ) Dim WithEvents MyVar as Class1
34.Know all about Forms Collection
35.Which line of code will create a new instance of an object new Form1 in
Project1.

[ ] Dim Frmx as Form1
[ ] Dim Frmx as New Form1
[ ] Set Frmx = Form1
[X] Set Frmx = GetObject("Project1.Form1")
36.How can you create a read-only property for a class?

[ ] Define a Property Get procedure and define a Property Let
procedure with no
arguments.
[ ] Define a Property Get procedure and a Property Let procedure.
[X] Define a Property Get procedure without a Property Set or
Property Let procedure.
[ ] Define a Property Set or Property Let procedure without a
Property Get procedure.
37.Advantages of Using ActiveX Documents (Choose 2).

The ActiveX Documents offer many advantages and increased
functionality to both the user
and the application developer. The most important advantage for
developers in using
ActiveX documents is the ability to apply existing programming
skills. Developers
38.What is the purpose of the ID parametr in an HTML tag?

[ ] Specifies a URL that points to a file containing an
implementation of an object.
[ ] Specifies the object's unique class identifier stored in the
system registry.
[ ] Specifies a URL that points to the name of the object.
[X]Specifies the object name.
39.How can you create a read-only property private and a write-only
property Public. Which of the
following are true?

[X] Private Property Get Name() As String
Name = txtname.text
End Property
Public Property Let Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
EndProperty

[ ] Public Property Set Name() As String
Name = txtname.text
End Property
Private Property Let Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
EndProperty

[ ] Public Property Let Name() As String
Nsme = txtname.text
End Property
Public Property Set Name(ByVal NewName as String)
TxtName.text = NewName
PropertyChanged "Name"
EndProperty
40.How do you create a license package file containing the licensing
information for all controls on a
Web page?

[ ] With the Visual Basic License Manager.
[ ] With the CODEBASE parameter of an HTML page'stag.
[ ] With the Visual Basic Application Wizard.
[X] With a utility form the LPK_TOOL directory on the Visual Basic
CDROM.
41.What elements of ActiveX Components on a Web page contribute to
security?

When you use ActiveX controls on a Web page, you can implement the
following security measures: Set the appropiate level of security in
Internet
Explorer, Provide users with information about the author of the
control, Through digital code
signing, Create an Internet download by marking your Controls as safe
for scripting and
initialization.
42.Which code segment would best trap a "division by zero" error
handling?

For example: (See Error Handling)

Public Sub ProcDivZero()
On Error GoTo ErrTrapper
X = 100 / 0
Y = X / 0
Exit Sub
End Sub
ErrTrapper
If Err.Number = 11 Then Debug.Print "Division by Zero Found"
EndProc
43.Which is the difference between debugging an ActiveX control project
and an in-process
component?
The componet code can run while the client is in Design mode.
(See Mastering VB5: ActiveX
Control).
44.Which project template would you select to build an in-process code

(ActiveX Document DLL)?
Add object dialog.