property Item.SingleLine([ColIndex as Variant]) as Boolean
Indicates whether the cell is displayed on a single or multiple lines.

TypeDescription
ColIndex as Variant A Long expression that specifies the index of the column, or A String expression that specifies the name of the column to query for cell's caption.
Boolean A Boolean expression that specifies whether the cell's caption is displayed by single or multiple lines.  
y default, the SingleLine property is False. The item's height is automatically computed if the SingleLine property is False. The Def(exCellSingleLine) / SingleLine property specifies whether the cell's caption is displayed by single or multiple lines.   By default, the height of the item is based on the height of the control's Font, so the height for all items are automatically updated once the user changes the control's font.