Now that Windows Millenium is out, we should add an IS_WINME macro to awt.h
to parallel the IS_WIN95, IS_WIN2000, etc. macros.

#define IS_WINME (IS_WIN95 && HIBYTE(LOWORD(::GetVersion())) >= 90)

Note: I didn't see an entry for Millenium or win_me in Bugtraq, so I filed
this against win_98.