Understanding the Difference Between ByVal and ByRef in VBScript

In VBScript, ByVal and ByRef are two keywords that are used when passing variables to subroutines or functions. The main difference between the two is in how they handle the passing of variables:

• ByVal: When a variable is passed ByVal (By Value), a copy of the variable is passed to the subroutine or function. Any changes made to the variable within the subroutine or function do not affect the original variable. ByVal is the default passing mechanism in VBScript.
• ByRef: When a variable is passed ByRef (By Reference), the actual memory address of the variable is passed to the subroutine or function. This means that any changes made to the variable within the subroutine or function will directly affect the original variable.

It is important to choose between ByVal and ByRef based on the desired outcome and the nature of the variables being passed. By understanding how each works, developers can ensure the proper handling of variables in their VBScript code.