RemoveAllItems Method
Removes all entries from a Microsoft Excel list box or combo box. Use the Clear method to remove all items from an ActiveX list box or combo box.
expression.RemoveAllItems
expression Required. An expression that returns a ControlFormat object.
Example
This example removes all items from a list box. If Shapes(2) doesn’t represent a list box, this example fails.
Worksheets(1).Shapes(2).ControlFormat.RemoveAllItems