Isn't there a guy on youtube that spills tea about the internals of old windows systems? And I suspect their NDAs about XP expired years ago - I don't see much harm in sharing these herbivore algorithms. Very cute post tho.
Which sort of makes sense. I'm not sure technical trade secrets have ever played much of a role in Microsoft's success.
With or without source code, programmers have been digging at the internals of Microsoft OSes for fun and profit since the DOS days, and Microsoft has always seemed to recognize that developers and customers relying on the undocumented nuances of their products benefits them far more than understanding them benefits their competitors.