Both the caller class and the implementation derive from this class. The caller class overrides the member functions to implement caller stubs. The dispatcher implementation class overrides the member functions to define the implementation (the code that performs the task in the remote location).
In the calculator example, MAdditionProtocol is the abstract base class. This class defines two member functions--Add and AddOne.
class MAdditionProtocol : public MCollectible {
public:
VersionDeclarationsMacro(MAdditionProtocol);
public:
MAdditionProtocol();
~MAdditionProtocol();
virtualTStream&operator>>=(TStream& toStream) const;
virtualTStream&operator<<=(TStream& fromStream);
virtual long Add(long num1, long num2) = 0;
virtual void AddOne(long& num) = 0;
private:
enum {kOriginalVersion};
};AddStub
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