Take a screenshot on Windows Phone 7 [closed]

Is there a way to take a screenshot of the Windows Phone 7? On the iPhone you can press the square button and the power button at the same time to take a screenshot, is there an equivalent action on WP7?

I am using a real phone and not the emulator. This is an easy task on the emulator, but I have collected some data via GPS, which is not available in the emulator.

No solution for the device but for the emulator you have this tool that takes "marketplace-compatible" screenshoots: http://www.innovativetechguy.com/?p=13

It would be nice to have this feature on the phone.

As kP and Mattheiu advise this isn't possible via hardware keys and you can still get dev screenys if that's your need using the tool recommended here.

If you did want to build a function to do this in to your app for some reason, possibly a hidden function of some kind, it can be done. This post will demonstrate.

Mark Arteaga - Screen Capture on Windows Phone 7