http://bugs.winehq.org/show_bug.cgi?id=11203
--- Comment #28 from Stefan Dösinger stefandoesinger@gmx.at 2009-08-14 15:35:49 --- (In reply to comment #27)
A 16 bit test case run under WinXP with a 32 bpp depth could shed some light.
What I mean with this is a Win16 test app that reads the depth on a 32 bit Windows running in 32 bpp color depth.