Anyone with Experience Using WinTV Capture Cards?

[W. eWatson]

W. eWatson wrote:
> A friend is looking for some help with how to use Python to access a 
> WinTV (Go Plus) capture card, and how to display an image from it. Is 
> there some facility that might help him, or does anyone have experience 
> with such use that might suggest sources?

Win XP OS. Any general methods for dealing with such commercially built 
capture cards?