What does "via form input" mean: are you adding records to a table that
serves as the RowSource for the combo box, or are you using the .AddItem
method?
If you're adding records to a table, make sure that the combo box's
RowSource is based on a query that has the appropriate ORDER BY clause.
If you're adding records using .AddItem, you'll need to retrieve the
RowSource for the combo box (it'll be a semi-colon delimited list), break it
into individual elements in an array (using the Split function), sort that
array, then reset the RowSource property. If there's more than 1 column to
the combo box, this becomes much more difficult.