VBScript5-VBScript Procedures

VBScript Procedures

We have two kinds of procedures: The Sub procedure and the Function procedure.

A Sub procedure:

• is a series of statements, enclosed by the Sub and End Sub statements
• can perform actions, but does not return a value
• can take arguments that are passed to it by a calling procedure
• without arguments, must include an empty set of parentheses ()

Sub mysub() some statements End Sub or Sub mysub(argument1,argument2) some statements End Sub

A Function procedure:

• is a series of statements, enclosed by the Function and End Function statements
• can perform actions and can return a value
• can take arguments that are passed to it by a calling procedure
• without arguments, must include an empty set of parentheses ()
• returns a value by assigning a value to its name

Function myfunction() some statements myfunction=some value End Function or Function myfunction(argument1,argument2) some statements myfunction=some value End Function

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Call a Sub or Function Procedure

When you call a Function in your code, you do like this: 

name = findname()

Here you call a Function called "findname", the Function returns a value that will be stored in the variable "name". 

Or, you can do like this: 

msgbox "Your name is " & findname()

Here you also call a Function called "findname", the Function returns a value that will be displayed in the message box. 

When you call a Sub procedure you can use the Call statement, like this: 

Call MyProc(argument)

Or, you can omit the Call statement, like this: 

MyProc argument