Returns or sets the number of lines in a command bar combo box control. The combo box control must be a custom control and it must be a drop-down list box or a combo box. Read/write Long.
Note An error occurs if you attempt to set this property for a combo box control that's an edit box or a built-in combo box control.
Remarks
If this property is set to 0 (zero), the number of lines in the control will be based on the number of items in the list.
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