Microsoft DirectX 9.0


The StartChain method switches all the filters in a filter chain into a running state.


HRESULT StartChain(
  IBaseFilter *pStartFilter,
  IBaseFilter *pEndFilter



[in] Pointer to the filter at the start of the chain.


[in] Pointer to the filter at the end of the chain. If this parameter is NULL, the method uses the longest possible filter chain that extends downstream from the start filter.

Return Values

Returns S_OK if successful. If the method fails, the return value may be VFW_E_NOT_RUNNING or another HRESULT value.


If this method cannot switch a given filter into a running state, it leaves all the filters in a stopped state. The filter graph must be running when you call this method.

See Also