How to be able to select a portion of the screen?

Question

In some screen capture software when you press a key it's possible for the client to select a portion of the screen. How can I implement that in my software written in framework 2.0 .Net?

Here is a image of what I would like to do : http://img341.imageshack.us/img341/3782/portionpb9.png you see, I can select a portion of the screen. How can I do that?

I do not want to know how to take a screenshot... any one?

Answer 1

Here is a tutorial that captures the screen. You can either only copy the part of the screen that was selected or try to change the code to only capture that part.

Answer 2

What I think I'll try to do is to take a screenshot of the whole screen than display top-most and having something to select into this big picturebox. Any idea how I can produce the rectangle effect? I guess by drawing with the mousedown?