Tapping into VGA output of a PC

Is it possible to tap into the VGA output of a (different) computer? The computer in question will be running a driving simulator (which is at full screen). I would like to feed this video to another computer running a program, that I've written, which can detect motorway/freeway lanes and generate an output to steer the vehicle running in the driving simulator.

I did find this: http://www.synthenv.com/PixelPusher_usb开发者_如何转开发_frame_grabber.aspx

A Frame grabber that can a VGA input and output it as a USB. Its also compatible with OpenCV (which is what I'm using for computer vision). Any suggestions on how to go about this?

Have you looked at VGA2USB Frame Grabber?

Frame grabbers are definitely an option. You could also convert your VGA signal to S-Video and use any graphics card with TV-in. Or, if you do not insist on running this on two computers, you could use a screen-grabbing camera driver, like http://www.splitmedialabs.com/vh-video-sdk/vh-screen-capture