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Procedures


There are two types of procedures in VBScript , Sub procedures or Function procedure . If you do not need to return a value you can use the Sub procedure but if your statements need to return a value then use a Function.

 

Sub Procedures

a sub procedure is a statement / series of statements that are enclosed by the Sub and End Sub statements


a sub procedure cannot return a value but it can perform certain actions
If you do not have any arguments you use ( )
Can take arguments that are passed to it by a calling procedure

Sub samplesub ( )
    collection of statements here
End Sub

 

Example:

 

Here is the code for the above example above

This code would go in the <HEAD> section of your page ideally

<script language="VBScript">
sub message()
	document.write("this is a VBScript Sub procedure")
end sub
And to call this sub procedure we would use the following 
</script>
<script language="VBScript">
call message()
</script>

 

Function Procedures

a sub procedure is a statement / series of statements that are enclosed by the Function and End Function statements
a sub procedure can return a value and it can perform certain actions
If you do not have any arguments you use ( ) on their own
Can take arguments that are passed to it by a calling procedure
it can return a value by assigning a value to its name

Function samplefunction(  )
        collection of statements here
        samplefunction = somevalue
End Function

 

Example

Here is the code for the example above

This would go in the <HEAD> section

 

<script language="VBScript">
function message1()
	message1 = "a sample VBScript function"
end function
</script>
This code would call the function 
<script language="VBScript">
document.write "here is  " & message1()
</script>

.

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