they do have a program that can detect hacks, and every .dll that is associated with engine.exe
when engine.exe uses one, but it isnt in the list, the game says "hey, this isnt part of Combat Arms, so it must be a hack that has been injected into Engine.exe"
and it shuts down the game. bypasses can be used to bypass (duh) this so that things that would normally be detected are not.
and i do believe they can take screenies of your game, and i bet they do if you are a suspect of hacking.