Mike,
Note Dale's comment about where to post this sort of question - but you can
find them if you start a VPC and don't maximize it. Go to Help and search
for shortcut keys.
The list it gives you is as follows:
Host key+L Restores Virtual PC Console from a minimized state. Moves Virtual
PC Console to the foreground.
Host key+I Installs Virtual Machine Additions.
Host key+ENTER Toggles a virtual machine between full-screen mode and window
mode.
Host key+DELETE Sends CTRL+ALT+DELETE to the virtual machine operating
system.
Host key+P Pauses or resumes the virtual machine, depending upon its current
state.
Host key+R Resets the virtual machine.
Host key+F4 Closes the virtual machine.
Host key+C Copies the selected items.
Host key+V Pastes a copied item.
Host key+A Selects all.
Host key+E Opens the virtual machine settings.
Host key+DOWN ARROW Minimizes the virtual machine.
Host key+LEFT ARROW Switches to the previous virtual machine when running
multiple virtual machines, unless you are using full-screen mode.
Host key+RIGHT ARROW Switches to the next virtual machine when running
multiple virtual machines, unless you are using full-screen mode.
Denis