Function and Procedures in Visual Basic 6.0: Understanding the Differences, Study notes of Computer Science

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VISUAL BASIC 6.

Function And Procedures

By Pragya Ratan Sagar

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

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

Calling a Procedure Procedure are called with or without the keyword call Syntax: …. Call procedurename() ….

Example: Private Sub clearcontrols() Text1.text = “ “ Text2.text = “ “ End Sub

Private Sub cmdreset_click() Call clearcontrols() End Sub

General Procedure

Event Procedure 4