Snagit is a great, easy to use, and affordable screen capture tool. If you need to take screen captures for home or work, we would recommend taking a look at his great piece of software.
One of the best modes is called "All-in-One". With the program running in the background, press the "print screen" button on your keyboard. You then have a cursor that allows you to simngle click a regoin highlighted or click and drag a region. Whe clicking a region you also have the option of selecting regions down to the pixel by using the keyboard arrow keys.
Natiive files are saved in a snagit fomat into a library. from there you can add arrows, highlight areas, or place a stamp on your image. That is the fun part. They have so many built in highlighting tools as well as many more to download. You can then output your screen shot to any of the common file formats. It defaults to .PNG which works best for screen shots.
Snagit is so easy to setup and use. It allows you to start creatiing graphics right away. It is very affordable at just $49.95. They also offer a free 30 day trial.
Snagit is a product of TechSmith, more info available at http://www.techsmith.com/snagit.html