|Microsoft DirectX 9.0|
The PauseChain method switches all the filters in a filter chain into a paused state.
HRESULT PauseChain( 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.
Returns S_OK if successful. If the method fails, the return value may be VFW_E_NOT_PAUSED or another HRESULT value.
If this method cannot switch a given filter into a paused state, it stops all of the filters in chain. The filter graph must be paused when you call this method.