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Notifies a filter that it has joined a filter graph.
HRESULT JoinFilterGraph( IFilterGraph * pGraph , LPCWSTR pName );
Parameters
- pGraph
- [in] Pointer to the filter graph to join.
- pName
- [in, string] Name of the filter being added.
Return Values
Returns an HRESULTvalue that depends on the implementation. HRESULTcan be one of the following standard constants, or other values not listed:
Value Description E_FAIL Failure. E_POINTER Null pointer argument. E_INVALIDARG Invalid argument. E_NOTIMPL Method isn't supported. S_OK or NOERROR Success. Remarks
The filter should store this interface for later use because it might need to notify the interface about events. The filter should not add a reference count to this interface. Doing so causes circular references and prevents the graph or the filter from ever being correctly released. The filter graph manager does hold a reference on the filter. The filter does not need to hold a reference to ensure that the interface does not disappear; it is notified of any such disappearance by a further call to IBaseFilter::JoinFilterGraph, with a null value for the pGraphparameter to indicate that the filter is no longer part of the graph.