From Ilium Software:
Using Ilium Software Screen Capture takes just six simple steps: Start the program on your device. Use the Options menu to define the App key to press to take your screenshots. Leave the program open - do not hit the Exit button yet. To stop the program, open it again and hit the Exit button. Find your screen captures in My Documents folder on your device. With Ilium Software Screen Capture, it's fast and easy to get screenshots from your device. Download today and you'll be ready to take screenshots on your Pocket PC anytime.