Windows Media Player 11 SDK WM/Composer Attribute
The WM/Composer attribute is the name of the composer of the music.
This attribute is stored in both the library (or cache) and the digital media file.
This attribute may have multiple values. To retrieve all of the values for a multi-valued attribute, you must use the Media**.getItemInfoByType** method, not the Media**.getItemInfo** method.
Composer is an alias for this attribute.
The Windows Media Format SDK constant for this attribute is g_wszWMComposer.
To determine whether you can change the value of this attribute, use the Media.isReadOnlyItem method.
Windows Media Player 9 Series or later.