//--- Create a new Worksheet
          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Create();
          Worksheet ws = wb.Worksheets.CreateWorksheet("Sheet2");

          //--- Get an existing Worksheet by index
          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Create();
          Worksheet ws = wb.Worksheets[0];

          //--- Get an existing Worksheet by name
          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Create();
          Worksheet ws = wb.Worksheets["Sheet1"];

          '--- Create a new Worksheet
          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Create()
          Dim ws As Worksheet = wb.Worksheets.CreateWorksheet("Sheet2")

          '--- Get an existing Worksheet by index
          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Create()
          Dim ws As Worksheet = wb.Worksheets(0)

          '--- Get an existing Worksheet by name
          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Create()
          Dim ws As Worksheet = wb.Worksheets("Sheet2")