DOKK / manpages / debian 12 / allegro5-doc / al_get_monitor_refresh_rate.3alleg5.en
al_get_monitor_refresh_rate(3alleg5) al_get_monitor_refresh_rate(3alleg5)

al_get_monitor_refresh_rate - Allegro 5 API

#include <allegro5/allegro.h>
int al_get_monitor_refresh_rate(int adapter)

Returns the current refresh rate of a monitor attached to the display adapter.

5.2.6

[Unstable API]: This is an experimental feature and currently only works on Windows.

al_get_monitor_info(3alleg5)

Allegro reference manual