The DLNAServerUDN attribute is the unique device name of the server that hosts the media item.
This attribute is not available for media items in the current user's local library. It is available only for media items that belong to a remote library; that is, a library that has been made available by another user on the home network. To determine whether a media library is remote, call IWMPLibrary::get_type.
|Windows Media Player 12|