IWMWriterNetworkSink::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 It has been superseded by Source Reader and Sink Writer.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 network port, and starts listening for network connections.
Syntax
HRESULT Open(
[in, out] DWORD *pdwPortNum
);
Parameters
[in, out] pdwPortNum
On input, pointer to a variable that specifies the port number. Set this value to zero if you want the network sink to select a suitable port. On output, the variable receives the port number that was used.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, the values shown in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The pdwPortNum parameter is NULL. |
|
The network sink is already open. |
|
The port number specified is already in use. |
Remarks
This method binds the port. To release the port, call IWMWriterNetworkSink::Close.
See the Remarks and Example Code sections for IWMWriter::BeginWriting.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 7 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) |