test.c

#include <allegro5/allegro.h>
#include <allegro5/allegro_opengl.h>
#include <allegro5/allegro_direct3d.h>
#include <stdio.h>

int main() {
    al_init();

    al_set_new_display_flags(ALLEGRO_DIRECT3D);
    //al_set_new_display_flags(ALLEGRO_DIRECT3D | ALLEGRO_FRAMELESS);
    //al_set_new_display_flags(ALLEGRO_OPENGL);
    //al_set_new_display_flags(ALLEGRO_OPENGL | ALLEGRO_FRAMELESS);

    ALLEGRO_DISPLAY *display = al_create_display(640, 480);
    ALLEGRO_EVENT_QUEUE *queue = al_create_event_queue();

    al_install_keyboard();
    al_install_mouse();

    al_register_event_source(queue, al_get_keyboard_event_source());
    al_register_event_source(queue, al_get_mouse_event_source());
    al_register_event_source(queue, al_get_display_event_source(display));

    al_set_window_position(display, 200, 200);

    int exit = 0;
    while (!exit) {
        ALLEGRO_EVENT ev;
        while (al_get_next_event(queue, &ev)) {
            if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
                exit = 1;
            }
            if (ev.type == ALLEGRO_EVENT_KEY_DOWN) {
                if(ev.keyboard.keycode == ALLEGRO_KEY_ESCAPE) {
                     exit = 1;
                }

                int x = 0;
                int y = 0;

                al_get_window_position(display, &x, &y);
                al_set_window_position(display, x, y);

                printf("Coords: %d, %d\n", x, y);
            }
        }

        al_flip_display();
    }

    al_destroy_event_queue(queue);
    al_destroy_display(display);

    return 0;
}