Functions, Procedures, Classes

Procedures: The procedures are of 2 types.
1. Function procedures
2. Sub procedures
Function can return the value, where as procedure can't return the value

Syntax of Function:
Function(Arg1,Arg2)
Dim c
C= Arg1*Arg2
End function

Syntax of procedure:
Sub (Arg1, Arg2)
Dim c
C = Arg1*Arg2
End sub
Call (a,b)
(a,b)

Local Procedure: Defining a procedure and reusing it in the same script is called local procedure
Global procedure: Defining a procedure in a library file and reusing it across multiple scripts is called global procedure

Eg:1 Function with single return value
Function calc(a,b)
Dim c
C= a*b
calc = c
End function
Res = calc(7,8)
msgbox res

Note: To return the value from a function we need to assign the return value to the name of a function. When ever we are returning the value, parenthesis () is must.


Eg:2 Function with multiple return values
Function calc(ByVal a,ByVal b,Byref c,ByRef d)
c= a*b
d=a+b
End function
Calc 7,8,x,y
msgbox x
msgbox y

Eg:3 Function & procedure with multiple return values
Function calc(ByVal a,ByVal b,Byref c,ByRef d)
c= a*b
d=a+b
End function
Sub sample()
Msgbox “Hi All”
End Sub
Calc 7,8,x,y
msgbox x
msgbox y
call sample

Note: Save the function or procedure in notepad & save it as .vbs file