The index of the first visible item in a list box. Initially the item with index 0 is at the top of the list box, but if the list box contents have been scrolled another item may be at the top.
[Visual Basic] Public Property TopIndex As Integer [C#] public int TopIndex {get; set;} [C++] public: __property int get_TopIndex(); public: __property void set_TopIndex(int); [JScript] public function get TopIndex() : int; public function set TopIndex(int);