<hr>...How do I create a screen dump of the actual icon on the desk top... <hr>
You seem to be using conflicting terms here. A screen dump is just that - a clipboard stored picture of the entire screen. Alt-PrintScreen works only for an individual window that is open and in focus. If you want a picture of the icon in question, you could use whatever graphics program you have to "crop" the screen image to show only the icon. Other methods are also possible, but cropping is the quickest and easiest, I think.