Connecting to the Interface using C++

[Beren]

Hi,
I'm Trying to connect a C++ application with EA but in the UserGuide there are examples only for VB, C# and Delphi. This is the code I'm using

EA::IRepositoryPtr r;
if (SUCCEEDED(r.CreateInstance("EA.Repository")))
{
      r->OpenFile("c:\\eatest.eap");
}

The COM objects are correctly registered (as the VB examples works fine) but I can't get the C++ code working.

Any ideas?

Thanks