I'm experimenting with internet TV and having some minor problems:

I have a laptop connected to the TV.
The video is connected with a VGA cable.
I'm getting sound with PC stereo speakers plugged into the headphone jack of the laptop. I think with the proper cord I can go from the headphone jack to the TV to use the TV sound system.

The main issue I'm having is getting full-screen video. It's about a 48" TV. I'm getting a 24" picture of the desktop on the TV, and it won't stay on full-screen on the laptop, so I'm ending up with about 16" on the TV.

Is this a Control Panel setting that would make the video larger?