silverlight - prevent screen capture -

I am developing a video player i silverlight I want to do something to stop recording or screen capturing

I thought about hacking the windows API and preventing my program from running, if any capturing software is asking a user to close it first, but I do not want to do this

Is there any other solution Is not ??

You can go about using a key hook system, by pressing the print screen key on the keyboard Preventing the user, it will be a start. There are not many systems that specifically prevent users from printing screening videos. Would you like to try watermarking your video instead? At least then people know that the video was originally mixed with you.