I had to do a bit of programming for NT4 only a few years ago (shudder), and the earliest OS the MSDN docs mentioned was always Windows 2000, even when those fu

I had to do a bit of programming for NT4 only a few years ago (shudder), and the earliest OS the MSDN docs mentioned was always Windows 2000, even when those functions existed on NT4. Microsoft isn't very interested in maintaining docs about their ancient OSes.