Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. When we call all these Functions, both Functions have no difference at this point. So, indeed, you should usually pass variables as value. Only pass as reference if you have an explicit need to do so.
ByRef is like a second return value. It passes a reference to the object into the function rather than the object itself. If you change the value of a ByRef parameter in the function, you will see those changes after the function ends. This lesson is part of an ongoing tutorial. The first part is here: Create your own Subs in VB. ByVal means that you are passing a copy of a variable to your Subroutine. You can make changes to the copy and the original will not be altered.
Visual Studio hides ByVal from you most of the time. It's hidden because ByVal is the default when you're passing variables over to a function or Sub.
ByRef is the alternative. This is short for By Reference. Its value will not be changed elsewhere. ByRef, by reference, means the variable location itself is copied. This program introduces 2 subs other than the Main subroutine.
It shows the Example1 method, which receives an integer parameter ByVal, and the Example2 method, which receives an integer ByRef. ByVal When the integer value is passed to Example1, its value is only changed inside the Example1 subroutine.
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