w_in (HWND_DESKTOP, W_TIME_FORWARD, (hwnd window) {
                                                    ...
                                                  });

w_in (HWND_DESKTOP, W_TIME_BACKWARD, (hwnd window) {
                                                     ...
                                                   });

w_in (HWND_DESKTOP, frame_window, W_TIME_FORWARD, (hwnd window) {
                                                                  ...
                                                                });

w_in (HWND_DESKTOP, frame_window, W_TIME_BACKWARD, (hwnd window) {
                                                                   ...
                                                                 });
