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Informs the pin to begin a flush operation.
HRESULT BeginFlush(void);
Return Values
Returns an HRESULTvalue.
Remarks
This member function implements the IPin::BeginFlushmethod and overrides the CBaseInputPin::BeginFlushmember function. It checks to see if the pin is connected, and then calls CBaseInputPin::BeginFlush, and finally calls the CTransformFilter::BeginFlushmember function.