Interface inheritance/MI

[Stabiplan BV]

Hello,

I am trying to find out the correct way to achieve inheritance of
interfaces and implementations.

The situation is as follows.

Base class (assembly a):
__gc __interface IMyObject
public:
void test1();
void test1( Object* test );

__gc class MyObject: public IMyObject
public:
virtual void test1();
virtual void test1( Object* test );
Now I want to build to following structure

(assembly b)
__gc __interface IMySpecificObjectA: public IMyObject
public:
void test2();

__gc class MySpecificObjectA: public MyObject, public IMyObject
public:
virtual void test1( Object* test );
virtual void test2();
__gc __interface IMySpecificObjectB: public IMySpecificObjectB
public:
void test3();

__gc class MySpecificObjectB: public MySpecificObjectA, public
IMySpecificObjectA
public:
virtual void test2();
virtual void test3();

etc..

Now I want to create an instance of MySpecificObjectB:
IMySpecificObjectB* instance = new MySpecificObjectB()

I expect I can call all methods defined in all interfaces, getting the
implementation from the class the method is implemented in. This does
not work in my situation. The compiler complains about methods not being
there (cannot instantiate abstract class, pure virtual function was not
defined).

I read about .NET being SI for the most parts and only supporting a
MI-subset, which is the situation described above (I think).

What I am doing wrong?

Regards,

Rob