IWMReaderNetworkConfig::GetLoggingUrl method (wmsdkidl.h)

Статья
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 It has been superseded by Source Reader and Sink Writer.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 GetLoggingUrl method retrieves a URL from the list of servers that receive logging information from the reader object. Use the IWMReaderNetworkConfig::GetLoggingUrl method to add servers to the list.

Syntax

HRESULT GetLoggingUrl(
  [in]      DWORD  dwIndex,
  [out]     LPWSTR pwszUrl,
  [in, out] DWORD  *pcchUrl
);

Parameters

[in] dwIndex

Specifies which URL to retrieve, indexed from zero. To get the number of URLs, call the IWMReaderNetworkConfig::GetLoggingUrlCount method.

[out] pwszUrl

Pointer to a buffer that receives a string containing the URL. The caller must allocate the buffer.

[in, out] pcchUrl

On input, specifies the length of the pwszUrl buffer, in characters. On output, receives the length of the URL, including the terminating null character.

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_INVALIDARG	NULL or invalid argument passed in.
ASF_E_BUFFERTOOSMALL	Size passed in to pcchUrl is too small.

Remarks

You should make two calls to GetLoggingUrl. On the first call, pass NULL for pwszUrl. On return, the value pointed to by pcchUrl is set to the number of wide characters, including the terminating null, required to hold the URL. Then you can allocate the required amount of memory for the string and pass a pointer to it as pwszUrl on the second call.

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)

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