The uncheck field statement removes the highlighting from a specified item in a multi-select list box or unchecks an item in a button drop list.
uncheck field field_name, number
• field_name – The name of the field containing the item you want deselected or unmarked.
• number – An integer indicating which item to deselect or unmark.
The finditem() function can be used to retrieve the number of an item from a multi-select list box or any other list field. The retrieved number can then be used as the number parameter.