/// <summary>
    /// The main entry point for the application.
    /// </summary>
    static void Main()
    {
        DataTable  dt;    // values here
        MyComboBox cb = new MyComboBox();

        cb.InitItems(dt);
        MyDataGridViewComboBoxColumn gvcb = new MyDataGridViewComboBoxColumn();

        cb.InitItems(dt);
    }