al_set_d3d_device_restore_callback - Allegro 5 API

       The  callback  will be called whenever a D3D device that has been reset is restored.  In the callback you
       should restore any d3d resources you have created yourself.  The callback receives the  affected  display
       as a parameter.

       Pass NULL to disable the callback.

       al_set_d3d_device_restore_callback - Allegro 5 API

       5.1.0

Allegro reference manual                                             al_set_d3d_device_restore_callback(3alleg5)

              #include <allegro5/allegro_direct3d.h>

              void al_set_d3d_device_restore_callback(
                 void (*callback)(ALLEGRO_DISPLAY *display))