We are beating our head on the wall trying to get site-config.jam to add an include path for the Windows SKD includes. We have tried many flavors of this:

using msvc : 12.0 : : <cxxflags>"-IC:\\Program Files (x86)\\Microsoft SDLs\\Windows\\v7.1A\\Include" ;

We found the magic and the file now looks like this. using msvc : 12.0 : : <compileflags>"-I\"C:\\Program Files (x86)\\Microsoft SDKs\\Windows\\v7.1A\\Include\"" ;

We need it to only be used with the 12.0 or Studio 2013 version of Studio.