Windows behaviour of CTRL key

Hi,

I'm running Fusion 5 with Windows 7 on a Mac. I very much need the CTRL key on the keyboard to behave like a Windows CTRL key within the VM. Now it behaves as a Mac key, that is as a right mouse click in fact. Can I switch it off somewhere in the VM or maybe somebody knows, can I switch it off on the Mac itself? I don't mind if it's completely off, cause I have a right click on the mouse.

Thanks very much.