TCustomListBox.TopIndex property

Declaration

property TopIndex: Integer read GetTopIndex write SetTopIndex default 0;

Description

TopIndex is an Integer property which contains the ordinal position in Items for the first visible list item in the scrollable control. The default value for the property is 0 (the first value in Items).

The property value is retrieved from the widgetset class when a handle has been allocated for the control. Setting a new value for the property causes the widgetset class to be notified of the value change when a handle has been allocated for the control.

The value in TopIndex is updated in the MakeCurrentVisible method where the current selection in ItemIndex is assigned to the property.

See also

• Items
• ItemHeight
• MakeCurrentVisible