Yes, thank you (TIMTOWTDI)! I was just curious to see what other's used, and was sad to see this comment: "You're writing C++ code, no need to regress back to C." Really? Sure it's from C, but it's a part of C++.
Going the route `using std::uint64_t`, you'd have to do that for every basic type. Which is fine. I'd just use that in a general header that's included everywhere in a project (stdafx, or what have you). Though at that point it doesn't really matter which you pick.