How can I make Virtualbox ignore specific keys?

Question

I use Virtualbox with Windows on Ubuntu host. I keep it on separate workspace (I use Xmonad). Xmonad uses Windows key as modifier. The problem is: when I press it, Windows machine opens start menu. Disabling keyboard autocapture helped a bit, but not completely. So, is there a way to setup Virtualbox in a way, so it will completely ignore specific keys or sequences?

Answer 1

These work for the guest windows in non Virtualbox environments and should control the guest.
In the windows guest can you right click on the desktop and select:-
-> graphic options -> then Hotkeys -> disable.
Disable all Hotkeys except win+l win+u-, reboot required.
http://www.autohotkey.com/docs/misc/Override.htm
I've tested on win 7 [options -> disable, the other says it works on all OS's(it is a Registry hack, normal warnings on reg.)]
Hope one of them works.