How can java call virtual method from C++?

[hura]

Hi guys,

I have a C++ dll file, a C++ header file including all methods that I can use. But the methods from the header file are virtual, then how can I use it. I've tried many way, but unable to call virtual methods from my java program.

My header file is like this:

class CManagerInterface
  {
public:
   virtual int  __stdcall Connect(LPCSTR server)          =0;
   virtual int  __stdcall Disconnect()                          =0;
   virtual int  __stdcall IsConnected()                        =0;
}

I use a tool named dllexp to view which methods the dll contains and I see that it doesn't contain any methods in the header file.

if I write my program in C++, I'd do something like this:

class CManager
  {
   ........
   loadDLLfile();
   CManagerInterface *manager;
   CManagerInterface* operator->() { return(manager);       }
  };

int main(){
  manager-Connect("myserver");
}

Everything works fine as I expected.
Now I wanna use the methods from the header file in my java program but I've found the way to do that.
I can load dll file, but then it says that it can't find the method.

What should I do?
Thx in advance.