typedef TMeasureItemEvent TMeasureItemEvent;
TMeasureItemEvent is the type for the OnMeasureItem event handler.
TMeasureItemEvent is the type for event handlers on custom-drawn controls that allow different items in a list to have different heights.
Control is a reference to the control that contains the item.
Index is the index of the item in the Items property.
Height is the default height of the item, in pixels. The event handler can reset Height to the appropriate value.