Has anybody figured out a good way to deal with 'empty' or NULL dates in the user interface?

I'd like to use the DateTimePicker, but I can't figure out how to make it use an empty or null date. IOW, set it so that it doesn't show a date.

The problem is that I'm databinding to the control so I get a 'low' date value (which I can trap easily enough) so the value gets set. Now when the value is low I want to clear it out and treat it as an empty date.

Any way to do this?

+++ Rick ---