public ComboBox ()
{
items = new ObjectCollection (this);
DropDownStyle = ComboBoxStyle.DropDown;
item_height = FontHeight + 2;
//background_color = ThemeEngine.Current.ColorWindow;
border_style = BorderStyle.None;
drop_down_height = default_drop_down_height;
flat_style = FlatStyle.Standard;
}
/* Events */