For more information about the port or GLib, GTk+ and the GIMP to native Windows, see http://www.iki.fi/tml/gimp/win32/ . ("Native" means that we use the Win32 API only, and not any POSIX emulation layer except that provided by the Microsoft runtime C library, and the pthreads emulation library from Cygnus.) As for now, only the Microsoft compiler and tools are really supported. Before compiling, check the BIN definition in makefile.msc. Compile with `nmake -f makefile.msc`. Install with `nmake -f makefile.msc install`. Cygwin (without cygwin runtime, i.e. "mingw32") and maybe LCC-Win32 support will be added later. Note that when using the cygwin compiler and other tools *with* the cygwin runtime the normal Unix configuration method should work. The thread support uses the pthreads package from Cygnus, which isn't ready yet, and thus really should not be relied upon.