extern void x_set_window_size (struct frame *, int, int, int);
extern void x_set_mouse_position (struct frame *, int, int);
extern void x_set_mouse_pixel_position (struct frame *, int, int);
extern void x_set_window_size (struct frame *, int, int, int);
extern void x_set_mouse_position (struct frame *, int, int);
extern void x_set_mouse_pixel_position (struct frame *, int, int);