+
+void
+settings_adv_cb (GtkButton *button,
+ gpointer user_data);
+
+void
+settings_std_cb (GtkButton *button,
+ gpointer user_data);
+
+void
+settings_ok_cb (GtkButton *button,
+ gpointer user_data);
+
+void
+settings_cancel_cb (GtkButton *button,
+ gpointer user_data);