DropDownLines Property Example
This example adds a combo box control containing two items to the command bar named "Custom". The example also sets the number of line items, the width of the combo box, and an empty default for the combo box.
Set myBar = CommandBars("Custom")
Set myControl = myBar.Controls.Add(Type:=msoControlComboBox, Id:=1)
With myControl
.AddItem Text:="First Item", Index:=1
.AddItem "Second Item", 2
.DropDownLines = 3
.DropDownWidth = 75
.ListHeaderCount = 0
End With