TK_WINDOWING_SYSTEM 10794 ext/tk/tcltklib.c #  define TK_WINDOWING_SYSTEM "win32"
TK_WINDOWING_SYSTEM 10797 ext/tk/tcltklib.c #    define TK_WINDOWING_SYSTEM "classic"
TK_WINDOWING_SYSTEM 10800 ext/tk/tcltklib.c #      define TK_WINDOWING_SYSTEM "aqua"
TK_WINDOWING_SYSTEM 10802 ext/tk/tcltklib.c #      define TK_WINDOWING_SYSTEM "x11"