IWMSyncReader::GetStreamSelected method (wmsdkidl.h)

Artigo
4/26/2023

[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetStreamSelected method retrieves a flag indicating whether a particular stream is currently selected.

Syntax

HRESULT GetStreamSelected(
  [in]  WORD                 wStreamNum,
  [out] WMT_STREAM_SELECTION *pSelection
);

Parameters

[in] wStreamNum

WORD containing the stream number.

[out] pSelection

Pointer to a variable that receives one member of the WMT_STREAM_SELECTION enumeration type on output. This value specifies the selection status for the specified stream.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
E_UNEXPECTED	The method failed for an unspecified reason.
E_INVALIDARG	The pSelection parameter is NULL, or the stream number is invalid.
NS_E_INVALID_REQUEST	No file is open in the synchronous reader.

Remarks

This method is identical to IWMReaderAdvanced::GetStreamSelected.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only],Windows Media Format 9 Series SDK, or later versions of the SDK
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	wmsdkidl.h (include Wmsdk.h)
Library	Wmvcore.lib; WMStubDRM.lib (if you use DRM)

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