//*************************************************************************
        //  Constructor: AddSelectedVerticesToGroupDialog()
        //
        /// <summary>
        /// Initializes a new instance of the <see
        /// cref="AddSelectedVerticesToGroupDialog" /> class.
        /// </summary>
        ///
        /// <param name="workbook">
        /// Workbook containing the graph data.
        /// </param>
        //*************************************************************************

        public AddSelectedVerticesToGroupDialog
        (
            Microsoft.Office.Interop.Excel.Workbook workbook
        )
        {
            Debug.Assert(workbook != null);

            m_oWorkbook   = workbook;
            m_sGroupName  = null;
            m_bIsNewGroup = false;

            InitializeComponent();

            // Instantiate an object that saves and retrieves the user settings for
            // this dialog.  Note that the object automatically saves the settings
            // when the form closes.

            m_oAddSelectedVerticesToGroupDialogUserSettings =
                new AddSelectedVerticesToGroupDialogUserSettings(this);

            ICollection <String> oUniqueGroupNames;

            if (ExcelTableUtil.TryGetUniqueTableColumnStringValues(m_oWorkbook,
                                                                   WorksheetNames.Groups, TableNames.Groups,
                                                                   GroupTableColumnNames.Name, out oUniqueGroupNames))
            {
                cbxGroupName.DataSource = oUniqueGroupNames.ToArray();
            }

            DoDataExchange(false);

            AssertValid();
        }
    //*************************************************************************
    //  Constructor: AddSelectedVerticesToGroupDialog()
    //
    /// <summary>
    /// Initializes a new instance of the <see
    /// cref="AddSelectedVerticesToGroupDialog" /> class.
    /// </summary>
    ///
    /// <param name="workbook">
    /// Workbook containing the graph data.
    /// </param>
    //*************************************************************************

    public AddSelectedVerticesToGroupDialog
    (
        Microsoft.Office.Interop.Excel.Workbook workbook
    )
    {
        Debug.Assert(workbook != null);

        m_oWorkbook = workbook;
        m_sGroupName = null;
        m_bIsNewGroup = false;

        InitializeComponent();

        // Instantiate an object that saves and retrieves the user settings for
        // this dialog.  Note that the object automatically saves the settings
        // when the form closes.

        m_oAddSelectedVerticesToGroupDialogUserSettings =
            new AddSelectedVerticesToGroupDialogUserSettings(this);

        ICollection<String> oUniqueGroupNames;

        if ( ExcelTableUtil.TryGetUniqueTableColumnStringValues(m_oWorkbook,
                WorksheetNames.Groups, TableNames.Groups,
                GroupTableColumnNames.Name, out oUniqueGroupNames) )
        {
            cbxGroupName.DataSource = oUniqueGroupNames.ToArray();
        }

        DoDataExchange(false);

        AssertValid();
    }