[rcfox]

C++ is not a superset of C[0]. If you want to use MSVC and newer features, then you're not writing C anymore; you're just writing an awkward C++ program.

[0] http://en.wikipedia.org/wiki/Compatibility_of_C_and_C%2B%2B

[udp]

Nope, I'm definitely writing C99, but it just so happens that MSVC is happy enough pretending it's C++.

Definitely writing C99 in that I compile the exact same source files with -std=c99 -Wall -pedantic when using a real C compiler.