delete in list-box%
Deletes a choice from the list box. Selected items that are not deleted remain selected, and no other items are selected.
(-> voidsenda-list-boxdeleten)
n: exact non-negative integerDeletes the item indexed by
n. List box items are indexed from0. Ifnis equal to or larger than the number of items in the control, anexn:fail:contractexception is raised.