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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