I hope this is an easy question.

If I use the DropDownCombo style, users are NOT restricted to the
choices provided, but can enter anything they choose.

If I use the DropDownList style, users ARE restricted to entering from
the list and cannot enter their own text. But I cannot find a way to
use this control and still allow the user to blank out the control once
text has been entered.

That is my question - how can I provide (blank) as an entry-choice in a
ListBox? I have tried all of these without success:

;a;b;c
a;b;c;
a;b;c;''
a;b;c;""
a;b;c;;

Thanks in advance!
Don Smith - Indiana University