RPG Copybook
RPG Subfile – Review the RPG Program Source Code, Part 1: COPYBOOK opens the hood on the foundational building blocks that make your subfile program behave the way it does.
This example code is broken into two parts:
Before diving into the main logic, this lesson walks you through the COPYBOOK; the shared definitions, data structures, and reusable components that quietly shape everything your program can do. By understanding how these pieces are organized and why they’re structured the way they are, you’ll gain a clearer view of the program’s architecture and set yourself up for smoother debugging, cleaner enhancements, and more confident development as the course progresses.