Windows Media Player 11 SDK IWMPMedia::getItemInfoByAtom 

IWMPMedia::getItemInfoByAtom

The getItemInfoByAtom method retrieves the value of the attribute with the specified index number.

Syntax

Parameters

lAtom

[in]  long specifying the index at which a given attribute resides within the set of available attributes.

pbstrVal

[out]  Pointer to a BSTR containing the returned value.

Return Values

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Remarks

This method can be used to retrieve metadata for a specific media item by using an attribute index number. The get_attributeCount method can be used to determine the number of attributes available for the media item.

The getMediaAtom method of the MediaCollection object can also be used to retrieve the index of a particular attribute. This technique is generally more efficient than the getItemInfo or getItemInfoByType methods when working with large playlists.

Before calling this method, you must have read access to the library. For more information, see Library Access.

Windows Media Player 10 Mobile: Attributes for a media item are available only during playback unless they are retrieved from the item through the media collection.

Requirements

Version: Windows Media Player 9 Series or later.

Header: Include wmp.h.

Library: Use wmp.dll.

See Also

• IWMPMedia Interface
• IWMPMedia::get_attributeCount
• IWMPMedia::getItemInfo
• IWMPMedia::setItemInfo
• IWMPMedia3::getItemInfoByType
• IWMPMediaCollection::getMediaAtom