Correct me if I am wrong, but considering what I've read into Unity Community forums, Unity uses C# instead of C++. Hopefully, there'll be a way to combine Unity with C++ but this is not the official way of doing things. Again, maybe I'm wrong. I've never make use of Unity, so ...
Let me quote some posts that might be helpful for you:
You don't really use C++ in Unity. You can in certain specialized cases, such as plugins, but not for scripting. And definitely not for Flash.
Short answer is no, you can't use C++ with Unity. In Unity, you can code in C#, UnityScript or Boo. You then deploy the same code to all the platforms supported by Unity. It does the conversion for you.
That said, I think that's the reason why you don't find many resources available for C++ in Unity.