property Editor.ButtonWidth as Long
Specifies the width of the buttons in the editor.

TypeDescription
Long A long expression that defines the width of the buttons in the editor, added using the AddButton method. 

Use the ButtonWidth property to increase or decrease the width of buttons in the editor. The button's height is the same with the ItemHeight property.  If the ButtonWidth property is zero ( 0 ), the control hides the buttons. Use the DropDownVisible property to hide the editor's drop down button.