Purpose Declares the name and arguments for a subprocedure. Syntax Sub Name Sub Name ([ByRef | ByVal] Arg) Sub Name ([ByRef | ByVal] Arg1, [ByRef | ByVal] Arg2) Name Any string that is a valid BASIC identifier. It can't begin with underscore characters or decimal digits (0-9). ByRef The argument is passed by reference. ByVal The argument is passed by value. This is the default if you don't specify either ByRef or ByVal. Arg Any valid BASIC identifier of any type. A Sub can receive any number of arguments. Example Sub DisplayMyUserInfo()         Print "My UserID is "; FCUserID End sub