John,
As far as what I would want to see in the next book, Bob Archer said it all.

Since that's not exactly useful feedback the 2nd & 3rd time around < g > here's list of areas from my copy of the current book that are either dog-eared, tagged/flagged, have thier own personal crease on the binding, or some sort of battle scar indicating frequent reference& reuse.

Chapters 2 & 5
ActiveX TreeView stuff
Chapter 7 (book tends to open to the "The Declare... DLL" page all on its own)
Chapter 15
Chapter 18

I'm not saying the rest of the book wasnt useful/insightful and digested eventually, I'm just saying the above areas is where I personally got my money's worth as far as frequent reference miles.