I performed the following sequence of actions
1) Installed MS VS2012
2) Installed WiX 3.6.3303.1
3) Created a new project from 'Templates/Visual C++/windows Installer XML/C++ Custom Action'
4) Try to compile...
Generated project will fail because "#include <wcautil.h>" is not found in the path (included in stdafx.h)
In the project properties I can see the following include path defined '$(WIX)sdk\VS2010\inc'
and $(WIX) evaluates (correctly) to 'C:\Program Files (x86)\WiX Toolset v3.6\'
However there is no '...\sdk\VS2010\inc'
There is a '...\SDK\VS2012\inc'
If you fix that manually a similar problem occurs with the link '...\sdk\VS2010\lib' does not exist but 'SDK\VS2012\lib\x86' and 'SDK\VS2012\lib\x64'
Not sure is there are any other properties with a similar problem