void vik_ext_tools_register ( VikExtTool *tool );
void vik_ext_tools_unregister_all ();
void vik_ext_tools_add_action_items ( VikWindow *vwindow, GtkUIManager *uim, GtkActionGroup *action_group, guint mid );
void vik_ext_tools_register ( VikExtTool *tool );
void vik_ext_tools_unregister_all ();
void vik_ext_tools_add_action_items ( VikWindow *vwindow, GtkUIManager *uim, GtkActionGroup *action_group, guint mid );