How Take Picture Of Screen

Take a picture of a computer screen?
How do you take picture of whatever is on the computer screen?
For example, on the iPhone/iPod Touch you can press the [hold] and [home] buttons together and it will take a picture of whatever is on the screen. Is there a way to do that on a PC?
Yes, on the MAC, you can hit control, alt f4, and it will take a complete screen shot of the computer.
On Windows, (running Vista, or 7) you can use snipping tool, and take a screen shot of whatever you want.
On computers running XP, or lower, you can download programs to do this. I would recommend CNET for downloading
How to take pictures in-screen with windows