On your computer or on the game? If you're doing it on the game, using F9 takes screenshots. If you have a PC, like me, you can find them by going into
Computer>Local Disc>Program Files>Disney>Disney Online>PiratesOnline>Screenshots
If you're trying to take pictures of your computer whenever, you'll have to download a program. Go to this thread if you want a great one.
http://www.piratesonlineforums.com/f...ad.php?t=11788
And that one should tell you all you need to know about that. Hope I helped!