The game goes to the same mode as the desktop - if you select windowed mode, as already stated.
However - and as other wide-screen laptop users have reported (I don't have one myself, my IBM R50e is 1024x768 standard windows format), most will happily take a request for 1280x1024 and display it as 1280x800, with a deduction at the bottom of screen for the taskbar.
However some 1280 widescreen laptops, if given a request for that resolution will barf. Ditto if you give it a request for 1600x1280 (for say the Dells etc with 14XX by something native screens). So you need to test against the particular driver the manufacturer supplies.
Laptops with thier often weird and wacky native screen formats can do strange things (like stretching the display), and not just for this game either. I am not going to release something that I cannot test on actual hardware pre-release, and I am not going to go out and buy a zillion different laptops either
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Cheers
Andy