al_create_popup_menu - Allegro 5 API

       Creates  a  menu  container  for popup menus.  Only the root (outermost) menu should be created with this
       function.  Sub menus of popups should be created with al_create_menu(3alleg5).

       Returns NULL on failure.

       al_create_popup_menu - Allegro 5 API

al_create_menu(3alleg5), al_build_menu(3alleg5)

Allegro reference manual                                                           al_create_popup_menu(3alleg5)

       5.1.0

              #include <allegro5/allegro_native_dialog.h>

              ALLEGRO_MENU *al_create_popup_menu(void)