initially the desktop screen display resolution was 1024 x 768
after changed it to 1680 x 1050 or a higher value ; it only displays 1280 1024 maximum resolution.

so what should be the problem ?

(installed in virtualbox P5Q Asus mainboard-QuadCore,Win7Ultimatex64).

please give me opinion.
I wantto use it fullscreen with full resolution support.
possible ?

thanks much.