Counter-strike 1.6 screen capture(repost)

I've a quite simple program that works as a anti-cheat software to my gaming platform, coded in c# language. It already takes EXTERNALLY screenshots and upload them to our server. What I need now is: use the in game command/bind "snapshot" to take the screenshots, and then upload them to our server, like we're doing now. If you're familiar with the game and capable of that, please contact me. You can also still use a external system, if you find a solution for the black screenshots problem Since I've no coding experience, I'll need that you integrate it on my current c# sofware, compile and make it able to distribute.