VirtualBox: have higher guest resolution than host resolution

VirtualBox: have higher guest resolution than host resolution

Is there any way to have a guest machine have a huge resolution (like 3000x2000 or something) in VirtualBox? I'd like to be able to move around the desktop by scrolling around. It seems like it would be possible. Most importantly, I don't want the windows that are not currently being shown in the guest machine to think they are being hidden. I just want to support a very large virtual desktop.