What programming language was Windows Vista programmed in?

Question

Which programming language(s) were used to code Windows Vista?

Answer 1

As far as I remember, the Windows Research Kernel (which is, afaik, based on XP) is written in C. I assume the rest is too. However, just because the kernel is written in C, doesn't mean the entire operating system is. There are also libraries, tools and applications without which Windows would be pretty useless. Of these, I assume that most are written in C, C++ or C#, though thats just an assumption.