how to get widescreen resolution

I just started work again for the summer and they are running on really small 15" norwood Micro widescreen monitors. To make matters worse, they are not running at native resolution. I looked it up, and these monitors run at 1200x800 natively. Right now they are running at 800x600. How do I change this to run at the correct resolution?

Thank you

Right-click the Desktop, choose Properties, then in the Settings tab you can change the resolution there.

I guess I should've clarified more
And SuperSparks- I thought you would've saw me around here enough to know I would've tried that..

The resolutions are all standard there. No widescreen