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Retrieves an interface and increments the reference count.
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. If the query is unsuccessful and the requested interface is IMediaPositionor IMediaSeeking, returns an HRESULTfrom a call to CreatePosPassThru. If the query is unsuccessful and the interface is not IMediaPositionor IMediaSeeking, returns E_NOINTERFACE.
Remarks
This member function implements the INonDelegatingUnknown::NonDelegatingQueryInterfacemethod. It overrides the CBasePin::NonDelegatingQueryInterfacemember function and passes references to the IPin, IQualityControl, IMediaPosition, IMediaSeeking, and IUnknowninterfaces. Override this class to return other interfaces on the object in the derived class.