Functions and Subroutines
If you are familiar with VB6 functions and subroutines, you have the basics for now. There are some additional changes that you need to familiarize yourself with, including the revision allowing function results to be assigned with the Return keyword.
Chapter 5 provides you ample opportunity to experiment with functions, subroutines, and the new Structure idiom. Chapter 5 also includes some function qualifiers that you may have forgotten about, including Optional and ParamArrays.