Hi,
The help file on topic Controls provides an example.
Set myControl = CommandBars("Custom").Controls _
.Add(Type:=msoControlComboBox, Before:=1)
With myControl
.AddItem Text:="First Item", Index:=1
.AddItem Text:="Second Item", Index:=2
.DropDownLines = 3
.DropDownWidth = 75
.ListHeaderCount = 0
End With
Cheers
Andy