WMCreateSyncReader function (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 It has been superseded by Source Reader and Sink Writer.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 WMCreateSyncReader function creates a synchronous reader object.

Syntax

HRESULT WMCreateSyncReader(
  [in]  IUnknown      *pUnkCert,
  [in]  DWORD         dwRights,
  [out] IWMSyncReader **ppSyncReader
);

Parameters

[in] pUnkCert

Pointer to an IUnknown interface. This value must be set to NULL.

[in] dwRights

DWORD specifying the desired operation. When playing back non-DRM content, or for an application that does not have DRM rights, this value can be set to zero. Otherwise, this value must be one of the values from the WMT_RIGHTS enumeration type, indicating the operation that is performed on this file. If multiple operations are being performed, dwRights must consist of multiple values from WMT_RIGHTS combined by using the bitwise OR operator.

[out] ppSyncReader

Pointer to a pointer to the IWMSyncReader interface of the newly created synchronous reader object.

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 function succeeded.
E_OUTOFMEMORY	The function is unable to allocate memory for the new object.

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
DLL	Wmvcore.dll

See also

Functions

Synchronous Reader Object