property Column.MaxWidthAutoResize as Long
Retrieves or sets a value that indicates the maximum column's width when the WidthAutoResize is True.

 TypeDescription 
   Long A long expression that indicates the maximum column's width when the WidthAutoResize is True.  

Use the MaxWidthAutoResize property to set the maximum column's width while the WidthAutoResize property is True. If the MaxWidthAutoResize property is less than zero, there is no maximum value for the column's width. By default, the MaxWidthAutoResize property is -1. Use the ColumnAutoResize property to specify whether the control resizes the visible columns so they fit the control's client area.