The Print Screen button on your keyboard can be used to capture a 'snapshot' image of your computer screen as it appeared when the button was pressed. When you use the keyboard to capture a screen shot, you will not see anything happen, but the image will be copied to your clipboard and is ready to paste into most documents, programs and e-mail.

To capture the entire screen, hold down Ctrl and Print Screen at the same time.
To capture a particular window, click in that window to make sure it is the active window, then hold down Alt and Print Screen at the same time.
Often you want to save only a small section of the screen shot you have captured. Using the Paint program, already on your computer, you can select and copy just the part you need.
then click and drag on the
image to select the area you need.Microsoft Office 2007 came with a notes management program called OneNote. When you open OneNote for the first time, it installs additional tools and features into many of your other Microsoft programs as well as a OneNote icon in your Windows taskbar. Once this has been set up, you can use the Screen Clipping feature of OneNote to select and capture specific parts of any screen display. Captured clippings are automatically copied to the clipboard, and can be pasted into documents, files and e-mails in addition to your OneNote notes.