This is the source code of the book SAMS Teach yourself boorland C++Builder in 21 days. The Chinese name is Borland C++Builder3.0 self-study training tutorial (I hope the company will publish it). However, this Chinese version does not come with source code, which greatly reduces self-study. . Now I put this set of source code here, hoping that readers who have this book can avoid some detours. At the same time, this set of source code is also a good routine, and it is recommended that beginners also download it.