software to export screen to laptop

Anyone heard of a software where you can hookup a laptop to your desktop and export one of the screens to your laptop maybe through a usb wire. I use esignal and have 2 screens but would like to maybe have a third one for stock scanning using my laptop and with esignal you can only use 1 computer at the same time .

 

This doesn't use USB but it may be what you are looking for: http://www.maxivista.com/

 

Thanks WINTER just what i needed.

 

Looks pretty cool. Has any one ever used this?

 

Tried it today. It works great? Its only $30