al_set_display_icons - Allegro 5 API

       Changes  the  icons  associated  with  the  display  (window).  Multiple icons can be provided for use in
       different contexts, e.g. window frame, taskbar, alt-tab popup.  The number of icons must be at least one.

              Note: If the underlying OS requires an icon of a size not provided then one of the bitmaps will be
              scaled up or down to the required size.  The choice of bitmap is implementation dependent.

       al_set_display_icons - Allegro 5 API

al_set_display_icon(3alleg5), al_set_window_title(3alleg5)

Allegro reference manual                                                           al_set_display_icons(3alleg5)

       5.0.9, 5.1.5

              #include <allegro5/allegro.h>

              void al_set_display_icons(ALLEGRO_DISPLAY *display,
                 int num_icons, ALLEGRO_BITMAP *icons[])