Windows Platform SDK Help in Visual Studio 2013 Help Viewer 2.1

Which of the HelpViewer 2.1 content items used in Visual Studio 2013 has the help for the Windows Platform SDK?  I'm looking for help for things such as SendMessage(), CoMarshalInterface(), CreateFile(), etc. used in C/C++ applications.  I'm not looking for the .Net equivalents, I'm looking for the native SDK help.  I cannot seem to locate it.  I have it for Visual Studio 2012, but not 2013.

Thanks.