Shape
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Contains Microsoft Excel control properties.
Using the ControlFormat Object
Use the ControlFormat property to return a ControlFormat object. The following example sets the fill range for a list box control on worksheet one.
Worksheets(1).Shapes(1).ControlFormat.ListFillRange = "A1:A10"
If the shape isn’t a control, the ControlFormat property fails; and if the control isn’t a list box, the ListFillRange property fails.