The most basic and simple way to take a screen-shot (screen-snap, snapshot, screen capture, whatever you call it) dating back to Windows 95 (3.1 even maybe?) is this:

  1. Press [Print Screen] button on keyboard.
  2. Open Wordpad (comes with windows by default – substitue with an Oddice product like Word for documentation or Outlook for an email)
  3. Use the paste function (Ctrl+V or Edit > Paste).
  4. Admire the pretty picture that just got inserted.
  5. Do something with the document.

This will just take a raw bitmat (.bmp) snapshot of the entire screen, then insert the image content into the chosen application.  For more advanced, fine tune control over your screen shots you’ll need a few tools.  Windows Vista and Windows 7 come with a tool call ‘Snipping Tool’ which can be used to capture only the content of a user selected area. 

For Windows XP you’ll have to use a 3rd party tool.  If you have MS Office on your XP machine, odds are you’ll have a little used program called Office Picture Manager (Start > All Programs > MS Office > MS Office Tools > MS Office Picture Manager).  You can use this application in lieu of Wordpad in step 2 above, then use it’s editing functionality to crop the screenshot down to only the portion you need.  You can then save the image as a JPG or PNG to reduce it’s file size.

 Screenshot