I "print screen" and then open a new palette in photoshop and paste in my "print screen", then I can crop and resize it and save it from there. It would probably also work the same with any other photo editing program. Seems like there should be a simpler way though, I've never done it any other way.
That's the way I've always done it, too. Only, instead of opening a new palette (PhotoImpact Pro doesn't work in 'layers' the way photoshop does) - I just click on 'edit' and the "paste it as a new image", and crop, etc. from there. :)