This free download from Microsoft may be old but contains some very useful tools. Media Info Explorer allows you to export a list of all songs and the associated attributes in the media player to an external program like Excel. The list can then be tailored to whatever your requirements are. This works for WMP 11 as well on an XP system. Tests are required for Vista and later releases of Windows.

Related to this: be careful when updating a playlist (.wpl) in WMP. You need to actually show the list of songs in the library and drags them to the list pane. You cannot just drag the play list to the list pane and save it as an updated play list.