+void ui_show_about_dialog(void);
+
+void ui_enable_alpha_channel(struct ui_psensor *ui);
+
+void ui_cb_preferences(GtkMenuItem *mi, gpointer data);
+void ui_cb_about(GtkMenuItem *mi, gpointer data);
+void ui_cb_menu_quit(GtkMenuItem *mi, gpointer data);
+void ui_cb_sensor_preferences(GtkMenuItem *mi, gpointer data);