Wrapping C++ code in a DLL for use in Java

Hi, i've tried google-ing this to death and i've found so many sites which teach how to wrap c++ code into DLLs for use in VB, ActiveX DLLs, MFC DLLs etc

But i haven't found one tutorial for java.

What i've done is, i've mirrored the tutorial for VB and tried to use it for Java using JNI n' all, i think my errors have come from packaging my C++ code and it's not the JNI side.

I've been using VC++ 6.0 Standard Edition, all i want to do is write a little C++ which which simply takes in two ints from java, adds them in the C++ DLL and pass back the summation of the two to Java.

Does anyone know any good tutorials or sample code for this boy?