|Normally in the Laptop BIOS, there is an option to stretch the screen. So when e.g. using a resolution of 800 x 600 pixels and your displays resolution is optimized for 1024 x 768, it stretches the 800 x 600 to the hole screen. When you disable this function, you'll get a black edge arround the desktop, displayed on the screen.|
I guess, that's what you want.
Please send a reply, if you solved the problem !!!