Windows print screen with Mac Keyboard

You could use the On-Screen Keyboard.

Start > All Programs > Accessories > Accessibility > On-Screen Keyboard

If you're trying to take a screenshot, you can do it programmatically. Take a look at this article: Programmatically Take Screenshot Using C#. Hope these ideas help.

I've got a brand new Apple extended keyboard connected to a DELL laptop running Windows 7 64-bit. This is what works for me:

F14 copies the entire screen to the clipboard.

Alt+F14 copies the active window to the clipboard.

To do a print screen while running Windows in Boot Camp and using a Mac keyboard, use the keyboard combination: SHIFT + FN + F11

Also works with mac keyboards on windows pc