Roy,
You may think that this right off subject, but there is a brilliant program called hypersnap which you can use to capture the print screen key & will automatically print whats on the screen & return to your program.
It can be set up so its seamless.
You can get it here
http://www.hyperionics.com/ for £25.00, or you can even get a temporary licence to see if it will do what you want.
I'll have a look to see if I can find the print screen code you mentioned, I may well still have it.
Regards
Robin
Rob