[eno_]

Win32 API != NT. Read up on NT architecture. NT could just as well have run PM instead of Win32. What you see here is an example of how a UI from a system with weak protection is difficult to bring forward into one with strong protection. Apple chose to break with the past in OS X and confine old software to compatibility boxes.

[Bush2000]

Win32 API != NT.

No kidding, Sherlock. But Win32 does call into the NT kernel to do messaging and windowing.