IWMProfile::GetDescription 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 It has been superseded by Source Reader and Sink Writer.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 GetDescription method retrieves the profile description. The description is a string that contains an explanation of what the profile should be used for.

Syntax

HRESULT GetDescription(
  [out]     WCHAR *pwszDescription,
  [in, out] DWORD *pcchDescription
);

Parameters

[out] pwszDescription

Pointer to a wide-character null-terminated string containing the description. Pass NULL to retrieve the required length for the description.

[in, out] pcchDescription

On input, specifies the length of the pwszDescription string. On output, if the method succeeds, specifies a pointer to a count of the number of characters in the name, 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	The pcchName parameter is NULL.
ASF_E_BUFFERTOOSMALL	The buffer pointed to by the pwszDescription parameter is not large enough.
E_UNEXPECTED	The method failed for an unspecified reason.

Remarks

You should make two calls to GetDescription. On the first call, pass NULL as pwszDescription. On return, the value pointed to by pcchDescription is set to the number of wide characters, including the terminating null character, required to hold the profile description. Then you can allocate the required amount of memory for the string and pass a pointer to it as pwszDescription 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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