void gtkcalendar::month-changed	(gtkcalendar *,
                               	 gpointer);
void gtkcalendar::day-selected	(gtkcalendar *,
                              	 gpointer);
void gtkcalendar::day-selected-double-click	(gtkcalendar *,
                                           	 gpointer);
void gtkcalendar::prev-month	(gtkcalendar *,
                            	 gpointer);
void gtkcalendar::next-month	(gtkcalendar *,
                            	 gpointer);
void gtkcalendar::prev-year	(gtkcalendar *,
                           	 gpointer);
void gtkcalendar::next-year	(gtkcalendar *,
                           	 gpointer);