So I was recently playing some Zoo Tycoon (http://pcgamingwiki.com/wiki/Zoo_Tycoon) via Windows XP in a virtualbox (I'm actually typing this right now in XP, how nostolgic) and whenever I launch the game it is stuck at 1280x1024. I tried the method mentioned on the WSGF link on that wiki page, but whenever I try that I automatically am reverted to the lowest resolution possible when I open the game, and none of the other resolution options are 1920x1080. Any tips, or maybe other ideas I can try?
Nevermind, apparently it is working now. I'm not entirely sure how. I set it to 900p in windowed mode and it worked, then I changed it to 1080p fullscreen and it worked somehow. Hopefully that helps anyone else with the same question.