It is on the right-top of ur keyboard, beside the "F12" button. Maybe named "Pr Scrn".
If u wanna capture anything on the screen, i think the print screen button couldnot help u. Press this button, u only get the full screen capture. So i recommend u try PCHand Screen Caputre. It could help u capture anything. Im using it, it is easy to use, even for a novice. I think it is pretty good. Hope it could help.
http://www.screen-capture-record.com/
On a Windows computer, F12 does not take screenshots. You must use the PrntScr (Print Screen) button to do this, which is usually located near the F12 button.
If you are referring to the button on a word document or in a window, the print button allows you to print what is on the screen of the computer. For example, if you press the print button in Microsoft word, your entire document will be printed unless you specify what pages.
The print screen button on your computer takes a still screenshot and pastes it to your clipboard. Whenever you open up any application after hitting your print screen key, you can paste the image of your computer screen.
JUST PRESS THE PRINT SCREEN BUTTON AT THE KEYBOARD,THEN THE PICTURE WILL APEAR AT THE "my pictures".
A screenshot on a Windows XP computer may be done by pressing the 'Print Screen' button, or on a Windows 7 computer by navigating to Start Menu > Accessories > Snipping Tool in addition to the 'Print Screen' function.
Print screen
press the print screen button - prtsccrop and print
Use the print screen function (hold down the Home button and then press the power button) with a Contact displayed on the screen. Then, print the image.
You press it.
Print Screen. The button on your keyboard.
To take a picture of the screen using a smartphone, press the power and volume down buttons simultaneously. On a computer, use the "Print Screen" button to capture the screen, then paste the image into a program like Paint and save it.
To copy the screen you can use Print Screen which is abbreviated prt sc on your pc's keyboard. All you have to do is press the print screen button and then go to word or paint on your PC and press CTRL V or paste(same thing) and the screen at which you pressed print screen will appear. On some PC's you may have to press fn(function button) and then the prt sc button.