>>After click you can use setfocus to another control. ;) I do that with my other POS application.
The other issue would be image transparency: image controls do it much better than buttons, though Rick Strahl identified a mechanism to load a png into an image control first after which the button also gets it right.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1