Allegro library troubles about mouse and exit

Hi, I have compiled a Allegro graphics program from a tutorial but the cursor is White squared and the main don’t quit properly.

#include <allegro.h>

int main(void)
{
	allegro_init();
	
	set_windows_title("Hello");
	
	install_keyboard();
	//install_mouse();
	enable_hardware_cursor();
	set_gfx_mode(GFX_AUTODETECT_WINDOWED,640,480,0,0);
	readkey();
	allegro_exit();
	return 0;
}
END_OF_MAIN();