I found a better screen shot tool today, Window Clippings.

WC (hardy-har-har) is a bit like the screen shot tool that comes with One Note 2007, i.e. when you want a screen shot taken, you crop from your whole screen what you want shot, so to say. Which is handy when working with One Note (WC also works with One Note, 2003 and 2007).  With Window Clippings, it’s a tad different.  You activate the application, then click the window you want (screen)shot.  Or you shift-click the window, and the screenshot will include the parent window of that window — if it has one.

If you have Vista, WC includes a few nifty features, such as preservation of window transparency and shadow — or removing of the window background (nice on Vista’s glass effects but also works with the rounded corners on XP windows).

Windows Clippings is freeware.