Right now we have al_resize_display() and al_get_display_width/height() functions - but no way to set and get the maximized property of a window. We probably should make it so the al_get_display_flags() dynamically updates the flag. Then to update it a function al_toggle_window_maximized() to go along with al_toggle_window_frame(). Or maybe a function al_set_display_flags().