Sets or returns the first worksheet tab to display in the tab bar at the bottom of the workbook window.

 public int FirstDisplayedTab{ get; set; }
Public Property FirstDisplayedTab() As Integer

          //--- Get the FirstDisplayedTab value of the workbook
          int firstTab = wb.FirstDisplayedTab;

          //--- Set the FirstDisplayedTab value of the workbook
          wb.FirstDisplayedTab = 0;
        

          '--- Get the FirstDisplayedTab value of the workbook
          Dim firstTab As Integer = wb.FirstDisplayedTab

          '--- Set the FirstDisplayedTab value of the workbook
          wb.FirstDisplayedTab = 0