Screen Capture of an online game?

[pincodes]

Hi guys, is there any plugin or .dll screencapture that can get pictures from an online game 3D such as Call of Duty?.
I tried with all plugins and dll as i could found, all works good until i open the game, then i get all black pictures, i was told that the plugins and .dll that ams support dosent works with directx, but maybe someone have a solution?

Thanks in advance.