How do you pass an argument by reference to a function in VBScript?
In VBScript, there are two ways values can be passed: ByVal and ByRef . Using ByVal , we can pass arguments as values whereas with the use of ByRef , we can pass arguments are references.
What is the difference between ByVal and ByRef?
ByRef = You give your friend your term paper (the original) he marks it up and can return it to you. ByVal = You give him a copy of the term paper and he give you back his changes but you have to put them back in your original yourself. As simple as I can make it.
What is argument in VBScript?
Positional arguments Calling a script with unnamed arguments is a simple method of passing values into a VBScript, those values can then be picked up within the script by reading the properties of WScript.Arguments cscript.exe demo.vbs December 500.
What is the difference between passing an argument by value and passing it by reference?
By definition, pass by value means you are making a copy in memory of the actual parameter’s value that is passed in, a copy of the contents of the actual parameter. In pass by reference (also called pass by address), a copy of the address of the actual parameter is stored.
What does ByRef mean?
ByRef in means that a reference to the original value will be sent to the function. It’s almost like the original value is being directly used within the function. Operations like = will affect the original value and be immediately visible in the calling function .
Can not use parentheses when calling a sub?
If a subroutine does not pass any arguments, then you do not use any parentheses. If you enclose the argument list in parentheses when attempting to call a subroutine that takes more than one argument, you will receive the runtime error “Cannot use parentheses when calling a Sub”.
What is sub in VBScript?
Sub Procedures A Sub procedure is a series of VBScript statements, enclosed by Sub and End Sub statements, that perform actions but don’t return a value. A Sub procedure can take arguments (constants, variables, or expressions that are passed by a calling procedure).