That in a nutshell is inheritance and virtual functions. This isn’t a tutorial but just a glimpse into this feature of C++. There is a ton of additional information on how to use inheritance ...

I found some MFC syntax that are not like C++ (or maybe it is just my inexperience). For example, some derived functions return "BOOL" and "TRUE." I know C++'s "bool" and "true." I replaced "TRUE ...