ListHeaderCount Property Example
This example adds a combo box control to the command bar named "Custom" and then adds two items to the combo box. The example uses the ListHeaderCount property to display a separator line between First Item and Second Item in the combo box. 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)
With myControl
.AddItem Text:="First Item", Index:=1
.AddItem Text:="Second Item", Index:=2
.DropDownLines = 3
.DropDownWidth = 75
.ListHeaderCount = 1
End With