I'm currently working on a touchscreen application. Like David said, nothing unusual, other than size. I don't know if all touchscreens are the same, but the one we purchase will be used by car mechanics with greasy hands, so we bought a screen that can be used with a pencil eraser. I think some of them only react to the heat of a human hand. Other than that I haven't found how to do a right-click of the "mouse".