Windows – Window Screen Shot

I am running VMware Fusion 3.0.1 in a MacBook Pro and I have a Windows 7 guest OS. In the "Virtual Machine" menu item, there is a "Send Key" option and there is an option for "Print Scrn", but that takes the entire desktop and not just the window that I want to capture. How do I go about sending "Alt + Print Scrn"? I've tried holding down the "Alt" (option) key while trying the Virtual Machine -> Send Key -> Print Scrn, but that doesn't work. Or is my only option to attach an external Windows keyboard?