Using Laptop as a 2nd screen

[.Kencs]

At work I need a 2nd screen, and I have a laptop on my desk which rarely gets used. Is it possible to have my laptop screen act as my 2nd monitor or can they not do this?
I'm sure it is possible, but need to be 100% sure before I attempt to mess around with my desk and dig out cables to test it.

Thanks

 

[.Kencs]

If I cannot a VGA cable using the 2nd output connection on my PC, and then go to properties, would it pick it up as a 2nd connection? Im guessing not by the replies but need to double-check?