IWMSyncReader::Open method (wmsdkidl.h)

[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 It has been superseded by Source Reader and Sink Writer.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 Open method opens a file for reading. Unlike IWMReader::Open, this method is a synchronous call.

Syntax

HRESULT Open(
  [in] const WCHAR *pwszFilename
);

Parameters

[in] pwszFilename

Pointer to a wide-character null-terminated string containing the file name to open. This must be a valid file name with an ASF file extension or an MP3 file name.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

The synchronous reader does not support streaming media. Passing a URL as pwszFilename results in an error.

Requirements

See also

IWMSyncReader Interface

IWMSyncReader::Close

IWMSyncReader::OpenStream