September’s documentation updates were posted to MSDN on October 2nd, 2009. You can access the updated documentation here:

http://msdn.microsoft.com/en-us/library/aa972908.aspx

 

You can download the offline version of the documentation (in Hxs format) here:

http://www.microsoft.com/whdc/DevTools/WDK/WDKdocs.mspx

 

As a reminder, we only release the documentation in Chm format for major OS milestones.