property Items.ItemMinHeight(Index as Long) as Long
Retrieves or sets a value that indicates the minimum height when the item's height is sizing.

TypeDescription
Index as Long A long expression that indicates the index of the item. For instance, the ItemMinHeight(-1) = 24, changes the minimum-height for all items to be 24 pixels wide.
Long A long value that indicates the minimum height when the item's height is variable. 
By default, the ItemMinHeight property is -1. The ItemMinHeight property has effect only if the item contains cells with CellSingleLine property on False. The ItemMaxHeight property specifies the maximum height of the item while resizing. The CellSingleLine property specifies whether a cell displays its caption using multiple lines. The ItemHeight property has no effect, if the CellSingleLine property is False. If the CellSingleLine property is False, you can specify the minimum height for the item using the ItemMinHeight property. Use the ItemAllowSizing property to specify whether the user can resize the item at runtime