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Retrieves an interface and increments the reference count.
HRESULT NonDelegatingQueryInterface( REFIID riid, void ** ppv );
Returns E_POINTER if ppvis invalid. Returns NOERROR if the query is successful or E_NOINTERFACE if it is not.
This member function provides an implementation of the INonDelegatingUnknown::NonDelegatingQueryInterfacemethod. By default it passes out references to IDirectDrawand then calls the CUnknown::NonDelegatingQueryInterfacemember function for base class interface references. Override this class to return interfaces added in the derived class.