28. ByVal And ByRef
This tutorial will teach you about ByVal and ByRef . If you want to create a proper function, you need to learn how to use ByVal and ByRef. They will allow you to create your own function with advanced features. The concept of ByVal and ByRef is one that is very hard to grasp, so don’t worry if you don’t get it the first time. As the code changes in this tutorial, no source code will be provided.