I don't actually need it, but it would be interesting for the others who requested that feature
I tried to take some PRINT screenshots with an Overlay renderer active, and the image is correctly available in memory. I'm under Windows 7, and probably it handles the Overlay layer in a different way than Windows XP and previous OSes did.
Anyway, 5 years ago, a former active BSplayer plugin maker (
RafkeP), developed an Ambilight filter to be used with BSplayer. He also arranged an hardware project to emulate the Ambilight function.
Here the link to the discussion on this forum, and
here the home of his project, with full tutorial and download links.
I hope to find the time to come back to my programming sessions... Maybe with a .Net language and not in VB6