gboolean grab_keyboard(gboolean grab);
gboolean grab_pointer(gboolean grab, ObCursor cur);
gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win);
-void grab_server(gboolean grab);
+gint grab_server(gboolean grab);
void grab_button(guint button, guint state, Window win, guint mask);
void grab_button_full(guint button, guint state, Window win, guint mask,