Notebook as a desktop monitor

Hi experts,
I have a question about desktop monitor.
Is it possible to use a laptop as a monitor for desktop?
(I know you can use external monitor to view contents on laptop. but is the other way possible?)

I don't want to buy a monitor for my desktop pc. Is it still possible to operate it using my laptop?
Thank you very much.
Who is Participating?
Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
To a certain extent, yes.  If you can boot the desktop and get it into Windows, you can use Remote control software to control it.  VNC (RealVNC, TightVNC, UltraVNC) is free and would permit this.  If the system runs XP PRO (NOT Home), you can use the Remote Desktops feature to connect to the system (better performance than VNC - you won't be playing games (more than solitaire) but it will do nicely for regular every day tasks.
If you're trying to use your laptop as a substitute for an LCD monitor, then no, you can't just plug your video card into it and display your desktop.  Only a working laptop running a program like VNC, as leew suggests, will let you do this.
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