+extern Lisp_Object w32_menu_show (FRAME_PTR, int, int, int, int,
+ Lisp_Object, char **);
+extern Lisp_Object ns_menu_show (FRAME_PTR, int, int, int, int,
+ Lisp_Object, char **);
+extern Lisp_Object xmenu_show (FRAME_PTR, int, int, int, int,
+ Lisp_Object, char **, EMACS_UINT);