enableing GL overlays

[Bruce Dobrin]

Hi,
 I'm just getting back into cyg/xfree after doint other things for a bit.
I'm wondering how to turn on Overlays? I know on Linux I just turn them on
in the Graphics Device Section in the XF86Config file (Option "Overlay"
"on"), I understand the cyg/xfree is driver independent, using Direct Draw
or somesuch thing.  I made sure that Overlays were enabled in the windows
driver,  but I still get errors such as this one

AppWindow::createWindow > could not create overlay visual (try `glxinfo' to
check for availability on your graphics hardware), (sev = 5)


I looked up enableing overlays in the Mailing list and Docs,  but didn't
find anything relevant..

Thanks,  Bruce D.
dobrin@imageworks.com