procedures in VBScript
procedures in VBScript
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:
sub message() document.write(”this is a VBScript Sub procedure”) end sub call message()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 function procedure is a statement / series of statements that are enclosed by the Function and End Function statements
a function 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
function message1() message1 = “a sample VBScript function” end function document.write “here is ” & message1() Here is the code for the example aboveThis 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>
