IAMWstDecoder::SetServiceState method (iwstdec.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
Applications use the SetServiceState method to assign the service state.
Syntax
HRESULT SetServiceState(
[in] AM_WST_STATE State
);
Parameters
[in] State
Specifies a member of an AM_WST_STATE enumeration to assign the service state.
| Value | Description |
|---|---|
| AM_WST_STATE_On | Closed captioning on. |
| AM_WST_STATE_Off | Closed captioning off. |
Return value
When the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Requirements
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | iwstdec.h |
| Library | Strmiids.lib |