How to make print screen button?

I want to print screen button, is it possible?

like for the swf or your whole desktop, if swf im trying to find out how too..

Hi,

Look at this http://php.net/manual/en/function.imagegrabscreen.php

of course you will need to know a little php/flash

biggest problem would be your isp using this version of php, as most don't use the latest.