VB Function and procedure

1. VISUAL BASIC 6.0 Function And Procedures By Pragya Ratan Sagar

2. Functions It is a separate procedure that can take arguments, perform a series of statements and change the value of its argument or Functions are named blocks program code that perform a specific task and return a result. The task can be as simple as adding two numbers or as complex as launching a spacecraft Syntax : Function FunctionName (argument list) As Datatype VB statements. . . . End Function 1

3. The arguments to the function are declared as : 1. By ref When passing by reference , the address of arguments are passed. Example: Public Function Sum( ByRef Number1 As Double, ByRef Number2 As Double ) As Double Sum = Number1 + Number2 End Function 2 . By val When passing by value , copies of the arguments are passed . Example: 2

4. Procedures Procedure is a block of statements which performs a particular task, just that it does not return a result Syntax : [Private|Public] Sub ProcedureName(argument list) VB Statements. . . . End Sub Types of procedures : 1. General Procedure General procedure is one that we create for our own specific purpose. 2. Event Procedure Event procedure is a procedure associated with the event of an object and are named in a way that indicates both event and object clearly. 3

5. Calling a Procedure Procedure are called with or without the keyword call Syntax: …. Call procedurename() …. Example: Private Sub c learcontrols() Text1.text = “ “ Text2.text = “ “ End Sub Private Sub cmdreset_click() Call clearcontrols() End Sub General Procedure Event Procedure 4

6. Function And Procedures By Pragya Ratan Sagar