Sources of information

[Dave Pickles]

Are there any sources of 'undocumented' information about Win32 useful for
Wine?

I have Schulman's "Undocumented Windows" book, but that covers 16-bit
Windows only. I assumed there would be a similar book covering Win32 but a
search in Foyles (London's largest technical bookshop) failed to find one.
There is an "Undocumented NT" but it doesn't cover the gaps in the Win32
API information.

Dave Pickles