cairnswm, shame on you... you should know better than to give such an answer. (Though I can understand why you did it )

dxdraw1.Surface.draw(10,10, rect(10,10,20,20), myAlfabetImage, false);

Whereas rect(10,10,20,20) is the rectangle around the letter you want to draw on the screen. And yes, this will only display the letter on the screen, even if the origional image has not been drawn.