If you would like to have for the users of your game the option to print the screen of the game while they are playing you can have a short cut for them to click and use :
Action.OpenExeFileAndWait"printscreen.exe"
And save this exe I coded to your External projects folder .
It will print the screen then open their windows print program with the picture ready for them to do with it what they like .
Download the file here
see post below.
Credit would be nice but not needed if you don't want to.