• button : osx_button_st_ , win_button_st_
• create_button_fn : gui_factory_vtable_st_
• delete_fn : button_vtable_st_ , gui_factory_vtable_st_
• gui_factory : osx_factory_st_ , win_factory_st_
• id : osx_button_data_st_
• next_button_id : osx_factory_data_st_
• osx_button_data_h : osx_button_st_
• osx_factory_data_h : osx_factory_st_
• paint_fn : button_vtable_st_
• private_h : gui_factory_st_ , button_st_
• vtable : button_private_st_ , gui_factory_private_st_
• win_button_data_h : win_button_st_
• win_factory_data_h : win_factory_st_