property ComboBox.SortBarColumnWidth as Long
Specifies the maximum width a column can be in the control's sort bar. /*not supported in the lite version*/

TypeDescription
Long A long expression that indicates the width of the columns in the control's sort bar. If the value is negative, all columns in the sort bar are displayed with the same width ( the absolute value represents the width of the columns, in pixels ). If the value is positive, it indicates the maximum width, so the width of the columns in the sort bar may differ. 
Use the SortBarColumnWidth property to specify the width of the column in the control's sort bar. Use the SortBarVisible property to show the control's sort bar. Use the Width property to specify the width of the column in the control's header bar. Use the SortBarHeight property to specify the height of the control's sort bar. Use the SortBarCaption property to specify the caption being displayed in the control's sort bar when it contains no columns.