public DropDownCellEditor()
: base()
{
TextBox textbox = new TextBox();
textbox.AutoSize = false;
textbox.BackColor = SystemColors.Window;
textbox.BorderStyle = BorderStyle.None;
textbox.MouseEnter += new EventHandler(textbox_MouseEnter);
this.Control = textbox;
this.dropDownContainer = new DropDownContainer(this);
this.droppedDown = false;
this.DropDownStyle = DropDownStyle.DropDownList;
this.dropDownWidth = -1;
this.parentForm = null;
this.activationListener = new ActivationListener(this);
this.containsMouse = false;
}