I'm reading an outdated programming book, "Teach Yourself Windows 95 Programming in 21 Days." It sucks, but whatever. The book advocates using #include <windowsx.h>, but it mentions that it helps with portability between Win16 and Win32, which I don't care about, since Win3.1 is quite dead now. It also mentions using "Message Crackers," a term which may be made up by the author. Anyway, is windowsx.h still used, or is entirely antiquitated?