Running Window 7 on Mac Lion under Parallels. What is the 'click' to do a screen capture? I don't see a 'PrtScn' option in the Parallels Keyboard Preferences.
PrintScreen is an option that you can map to in Keyboard Preferences. Parallels Desktop | Preferences... | Keyboard You can add a new Virtual Machine Shortcut by highlighting Virtual Machine Shortcuts and pressing the + button. PrintSc is available in the drop down in the To: section. Below I've included an image.