Install c99wrap & c99conv
You can get the source and build these tools, but it would require installing clang. To avoid the hassle, you can get precompiled version from:
Unzip the 3 files (c99wrap.exe, c99conv.exe & makedef) and place them in your path.
If you run into any issues, you can also place the files in your Visual Studio bin folder (example: C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin).