rb_w32_osid        99 include/ruby/win32.h extern DWORD rb_w32_osid(void);
rb_w32_osid       100 include/ruby/win32.h #define rb_w32_iswinnt()  (rb_w32_osid() == VER_PLATFORM_WIN32_NT)
rb_w32_osid       101 include/ruby/win32.h #define rb_w32_iswin95()  (rb_w32_osid() == VER_PLATFORM_WIN32_WINDOWS)