al_set_new_window_title - Allegro 5 API

       Set  the  title  that  will  be  used  when  a  new  display is created.  Allegro uses a static buffer of
       ALLEGRO_NEW_WINDOW_TITLE_MAX_SIZE(3alleg5) to store this, so the length of the titme you set must be less
       than this.

       al_set_new_window_title - Allegro 5 API

al_set_window_title(3alleg5),        al_get_new_window_title(3alleg5),        al_create_display(3alleg5),
       ALLEGRO_NEW_WINDOW_TITLE_MAX_SIZE(3alleg5)

       5.1.12

Allegro reference manual                                                        al_set_new_window_title(3alleg5)

              #include <allegro5/allegro.h>

              void al_set_new_window_title(const char *title)