The WindowsAPI for developing 32-bit applications. Win32 is built into Windows 95 and Windows NT so applications that rely on the API (Win32 applications) should run equally well in both environments. It is also possible to run some Win32 applications under older 16-bit versions of windows by installing the Win32s runtime system.
Win32 Programming FAQ Answers to questions collected form the comp.os.mswindows.programmer.win32 newsgroup as well as other current technical questions.
