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Returns a specified reference-counted interface.
HRESULT NonDelegatingQueryInterface( REFIID riid, void **ppv );
Parameters
- riid
- Reference identifier.
- ppv
- Pointer to the interface.
Return Values
Returns E_POINTER if ppvis invalid. Returns NOERROR if the query is successful or E_NOINTERFACE if it is not.
Remarks
Returns a pointer to IMediaPositionand IUnknowninterfaces by default. Override this member function to publish any additional interfaces implemented by the derived class.