Combo boxes (the Access name for drop down lists) are limited to
only selecting one value. If you need multiselect, consider using
a list box.
If it's being used to select WHERE criteria, you could combine the
combo box with a text box, and add values to it separated by OR, and
then pass the contents of the OR clause through
Application.BuildCriteria() and end up with a proper WHERE clause
from it. I do this all the time on my query-by-form interfaces.
