IWMPMedia3::getAttributeCountByType method (wmp.h)
[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The getAttributeCountByType method retrieves the number of attributes associated with the specified attribute type.
Syntax
HRESULT getAttributeCountByType(
[in] BSTR bstrType,
[in] BSTR bstrLanguage,
[out] long *plCount
);
Parameters
[in] bstrType
BSTR containing the type.
[in] bstrLanguage
BSTR containing the language. If the value is set to null or "" (empty string), the current locale string is used. Otherwise, the value must be a valid RFC 1766 language string such as "en-us".
[out] plCount
Pointer to a long containing the count of attributes that are associated with the type.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
Remarks
This method is used to determine the number of attributes corresponding to a particular attribute name for a given media item. Index numbers can then be passed to the getItemInfoByType method. This is useful, for example, when a media item has been categorized under multiple genres.
Before calling this method, you must have read access to the library. For more information, see Library Access.
Windows Media Player 10 Mobile: This method always retrieves a long set to 0.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Media Player 9 Series or later. |
| Target Platform | Windows |
| Header | wmp.h |
| DLL | Wmp.dll |