Thrid party DLL function call.

Hello,
I am a programming novice trying to learn more about Java. I am currently working on a project for my employer (a side project really) that is used in generating some specific alpha-numeric codes. Actually, I am re-writing an existing program into Java as a personal exercise for myself but it may have some useful applications down the line.
This project requires me to use a 3rd party DLL function call. I have been trying to follow through the process of using the JNI interface, however, I believe that I need to create a wrapper DLL to handle the function call. Does anyone know how to do this or can they point me in the right direction? I believe the 3rd party DLL was written in C++ but that's all I know at this point.
Any help is appreciated.
TIA

To those of you who will look this topic up and wonder how I was able to do that here:
(using Visual C++ for the example)
3rd party DLL : Key32.dll
wrapper DLL: Key32Liaise.dll
SWIG interface: Key32Liaise.i
wrapper class: Key32Liaise
1) Make reference to your external function call as if it were a class method. The class name should be that of your "wrapper" class. (e.g. Key32Liaise.getHashCode() ) I like to call the wrapper class the "laise" class because it acts as the go-between.
2) Download SWIG. Create your interface file and run the command: swig -java -shadow -c++ Key32Liaise.i This will generate Key32Liaise.java shadow class and Key32Liaise_wrap.cxx wrapper code.
3) Compile the Java code into Class files and generate a header file for the wrapper class (i.e. javah Key32Liaise). You will need this header file even though the SWIG site doesn't mention this.
4) Open VC++ and open a new project file Key32Liaise to create a DLL. Write the C++ code that calls up the function from the Key32.dll file. You will have to look that up from the MSDN site...too much to put down here.
5) Include the appropriate files and complile the wrapper DLL.
Hope that make sense!!!

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