ListBox-SelectItem

Имя функции dcl-ListBox-SelectItem
Синтаксис   (dcl-ListBox-SelectItem <CONTROL> ItemIndex [типа Long] {Select [типа Boolean]})
Возвращаемый тип Boolean (T - успешно; иначе NIL)
Подходит к List Box

This method selects or deselects the item at ItemIndex. If Select is T, the item is selected; otherwise it is deselected. This method does not work for single-selection lists (see SelectionStyle).