Any way to display the total duration of the current playlist?

I've tried searching and found an old (2004) post in German that asked this (I think, Chrome translation is, um, imperfect). It seems like a basic music player feature but I don't know of any way to display the sum of the time of the tracks in the current playlist. The data is definitely in library.db for each track, but I don't know enough about how the interface is put together to know how or when the data for the tracks is retrieved. I think it doesn't help that I'm running LMS on Windows so I don't have direct access to any of the Perl scripts? I suppose it also doesn't matter that I could write the PHP code to do so fairly easily.

Foobar2000 will give the information by selecting all the tracks and selecting Properties from the context menu. Winamp displays this information by default:

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