property Items.ItemMaxHeight(Item as HITEM) as Long
Retrieves or sets a value that indicates the maximum height when the item's height is variable.

TypeDescription
Item as HITEM A long expression that indicates the handle of the item. If the Item is 0, setting the ItemMaxHeight property changes the maximum-height for all items. For instance, the ItemMaxHeight(0) = 24, changes the maximum height for all items to be 24 pixels wide.
Long A long value that indicates the maximum height when the item's height is variable. 
By default, the ItemMaxHeight property is -1. The ItemMaxHeight property has effect only if it is greater than 0, and item contains cells with CellSingleLine property on False. Use the ItemHeight property to get the item's height. Use the CellVAlignment property to align vertically a cell. Use the DefaultItemHeight property to specify the default height for all items before loading items.