# Python / Pygame 199 #

    import pygame as p
    p.init();s=p.display.set_mode((1,1),p.FULLSCREEN);s.fill((0,0,0));p.display.flip();p.mouse.set_visible(0)
    while 1:
        for e in p.event.get():
            if e.type==p.KEYDOWN:p.quit()

I could probably loose some in detecting the input, I'll look into it.