Are you talking about using your laptop as a screen for your desktop? You can't do it directly, but you can use a program called synergy, or octopus to control both computers with a single mouse/KB. You still have to run the software on each of the computers, but you control them seamlessly as if it were truely one computer with 2+ screens. Or, you could try hooking the LCD to your laptop and running everything from the laptop, but the computer might not be strong enough to run em all.