Previous version of windows did not have tool to capture specific portion of your screen.A user would either have to buy or use a free screen capturing tool to capture the screen or go through a tedious task of of hitting the pressing [PrintScreen] after which he would have to use a third party application to save the image.
But, Windows vista comes preloaded with a tool that allows user to capture screen shots and edit them too. To this feature of Windows Vista follow these steps:
1. Click 'Start|Accessories|snipping Tool'.
2. Click 'New' and select an option from drop down list.
For Example 'Windows Snip'.
3. Select a window to be captured.
4. You can view the captured window in the editing window.
5. You can use tools to highlight important objects within image,send the image as an attachment or save in the computer.