Hi,
If you want to compile macros, you have to start root (or python) from a Visual Studio command prompt (from the Visual Studio Tools menu), where the environment variables are properly set, or call (e.g. for VS 2012) “C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\vcvarsall.bat” (with quotes) from a regular command prompt.
Cheers, Bertrand.