How to connect C++ to Unity 4.12.0?

i wanna ask, how to connect ver 4.12.0 to C++? as i saw in the tutorial, the unity (ver 4.4.3) have the option to create code puzzle through C++ but in my unity version there’s no such option.

can anyone suggest me how?

btw, can anyone suggest good ebooks for unity 4.12.0?

4.12.0? That doesn’t exist. The last release of the 4.x cycle was 4.7.2.

Not sure what you mean by “connect”? You mean write a plugin? There’s an example of a C++ plugin here: Unity - Manual: Native plug-ins