the great thing about greenshot (or snagit) is that i can press the Print Screen button on my keyboard - and then select the exact part of the screen that i want to copy using my mouse - and can be used for: Win 2000 / Win XP / Windows Vista / Windows 7.
with the standard Print Screen function - you get the whole screen - or if you press the Alt & the Print Screen buttons at the same time, a picture of the program (window) that you are working on at the moment. you then have to copy it into another program (paint, photoshop, word, whatnot... do do anything with it.
with greenshot - when you press the Print Screen button - the mouse turns into a plus signe with lines flowing to all four sides - you can then move the mouse (this plus) to the top right / top left / bottom right / bottom left of the part on the screen you want a shot of - click and hold the left (standard) mouse key - move the mouse to the opposite end of the part of the screen you want shot - let go - and the picture opens in the Greenshot image editor where you can edit the picture (write in it, draw lines and things, cut pieces, etc, etc) and of course save it as .jpg, .png, .gif or .bmp file (snag-it gives you more options), print, copy to clipboard, attach to e-mail
pretty nifty actually
HAVE JUST FOUND THE SNIPPING TOOL - ALSO AVAILABLE FOR OLDER OPERATING SYSTEMS (is included in Vista and Windows 7 - although I had never noticed it before - have Vista on my home PC and Windows 7 on my new laptop...)
http://microsoft-snipping-tool.software.informer.com/