I am not sure what your problem was with the tutorial line you quoted, that are not lies but just links to a C online tutorial, very useful BTW, but I know for sure that you can not compile a C++ header with a C compiler.

If you ask which language to use, my suggestion is either lite-C pure or C++, forget lite-C legacy and forget C-Script. Lite-C pure is meanwhile 100% better and more solid than C-Script. But if you want to use VC++ headers then just use VC++ as a programming language also, thats described in the SDK chapter of the manual.