Procedures or subroutines are used to perform an action. A subroutine starts with the keyword SUB then subroutine name. The code is written inside the subroutine before ending it with the keywords END SUB. Subroutines cannot return a value.

Example:

<%

SUB PrintMsg
response.write "I am in subroutine"
END SUB
response.write("Calling Subroutine <br />")
PrintMsg

%>

Passing Arguments:

<%

SUB PrintMsg (strMsg)
response.write strMsg
END SUB

response.write("Calling Subroutine <br />")
PrintMsg ("Passing argument to subroutine")

%>