SB, Have you tried any screen capture programs ? I use one called SnagIt for images. I can make a box around anything on the screen and save in any format. But the quality is only as good as what you saw on the screen. It will also capture any video on the screen and gets the audio through your mic and speakers. So it will pick up any other noise in the room. I've not used it much for video as I do not have a mic hooked up.
Rusty If You Want It Bad, You Get It Bad The Worse You Want It, The Worse You Get It