This isn't quite what you asked for ... but I think HyperSnap will do what you want !
http://www.hyperionics.com/index.asp.../changelog.asp
It's a screen capture program with both a direct editing facility and the option to save and edit captures in programs like Paint.
I use it to capture all kinds of things - including web pages - as it offers a "window" as well as "region" capture option. In other words, it will scroll and capture a window that is too long to be viewed on screen.
However, do invest a bit of effort reading the Help File and Tutorials ... it will save time in the end !
I know there are quite a few similar programs, but - being happy with HyperSnap - I've not had occasion to try them.
Perhaps someone else might offer other recommendations ?
Good luck, Anonany