also if you have the KDE libraries installed (at least, let alone all of KDE) you can obtain a program called ksnapshot and use that to take the picture.
as grin said, there's no need for the whole desktop. not to mention you being a smartass intentionally.
flux capacitor edit: And grin adds, fuck your desktop. If it's about a game, alt + printscreen at 1x res or die.
<Nach> so why don't the two of you get your own room and leave us alone with this stupidity of yours? NSRT here.