Using a laptop as a second monitor??

[Seanydude678]

I haven't heard anything about this, but I'm sure there's some way to make this possible. I have my main desktop and my laptop right next to it, and I want to know if there's a way to harness my laptop's screen for my desktop, to extend the desktop. There's gotta be someway to achieve this crazyness, but I don't know how. If anyone has any suggestions or just wants to say that this is completely ignorant, feel free to say so. Thanks

 

[runswindows95]

Won't work. There is no video input on every laptop I've seen.