property Item.EditWidth as Long
Specifies the width for the inside edit control.

TypeDescription
Long A Long expression that indicates the width of the inside edit control. If the value is negative, the absolute value indicates the minimum width for the inside edit control. If the value is positive it indicates the exactly width of the inside edit control. 
The EditWidth property specifies the width of the inside edit control, if the AllowEdit property is True. By default, the EditWidth property is -32, that indicates the minimum width of the inside edit control as being 32 pixels. Use the EditBorder property to specify the border around the edit control inside the item. Use the EditWidth property to specify the width of the inside edit control. The property has no effect if the AllowEdit property is False. For instance, the Item.EditWidth = 150, indicates that the inside edit control has exactly 150 pixels. If the Item.EditWidth = -150 it indicates that the width of the inside edit control can't be less than 150 pixels.