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Sunday, February 10, 2013

Know VB Tools


  Refer Introduction to VB before starting this session : 

Before going to to create any application in VB ,  keep this in mind that , you have to follow 3 main steps as;
  1. Create the interface
  2. Set properties
  3. Write code

1 : Create the interface : 


To create an Interface , we need FORMS , as shown below :



For creating objects in our form, we need tools . There is a number of tools in the TOOL BOX as shown below :


In detail:


See an example to print Hello Friend..Click the below given link : 
"Program to Print "Hello Friend"  .In this example, we are using COMMAND BUTTON and LABEL for printing HELLO.

That is we created an Interface with a command button and a label for displaying HELLO.


: Set  Properties : 

The Properties window provides an easy way to set properties for all objects on a form.Below given is the Property Window (View ->Property window).



Change the names as given below : 
  • CAPTION form1 to HELLO
  • Command Button COMMAND1 to PRINT (Here, CAPTION of the button is PRINT  , and the name of the same is COMMAND1 , which is used in writing code).
  • No need to change name of Label1.(If you set the name of LABEL1 as BLANK , then only PRINT command button is visible ) 
( For an object , there are 2 main properties , namely , CAPTION and NAME .If we change the CAPTION , it will display as the object name in the form .  NAME is used to write code).

And the new form , after setting properties should look like this :



(By doing programs in VB, you will be able to understand more about each properties. You can't remember the PROPERTIES by simply telling them).

: Write Code : 

Double-click the form or control for which you choose to write code.
This is the code editor window.


Private Sub Command1_Click()
Label1.Caption = "Hello Friend"
End Sub

After writing code , the code editor window is :



(Note that we changed the LOAD event to CLICK event).
Then RUN-> START or F5 to run the project.


For a complete list, click VB 


I think , you understand now the flatform of VB. Now do all the programs from the link 

VB 

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