Custom ComboBox with permanent items

[dmanhr]

Hi,

I'm developing a control (derived from ComboBox) with permanent items
(First, Previous, Next, Last). So, I'd like it's collection of items couldn't
be changed neither in design time nor programmaticall y.

public class Navigator: ComboBox {
Navigator() {
IntializeCompon ents();
}

private void InitializeCompo nents() {
this.Item.AddRa nge(new string[]{"First", "Previous", "Next", "Last"});
this.SelectedIt emChanged += new
SelectedIndexCh angedEventHandl er(ComboBox_Sel ectedIndexChang ed);
}

private void ComboBox_Select edIndexChanged( ) {
MessageBox.Show (SelectedIndex. ToString());
}
}

What should I do? I thought override Items property, but I couldn't realize
it.
Thanks in advance,
dmanhr