Dim workbook As New Infragistics.Documents.Excel.Workbook ()
Dim worksheet1 As Infragistics.Documents.Excel.Worksheet = workbook.Worksheets.Add ("Sheet1")
Dim worksheet2 As Infragistics.Documents.Excel.Worksheet = workbook.Worksheets.Add ("Sheet2")
Dim worksheet3 As Infragistics.Documents.Excel.Worksheet = workbook.Worksheets.Add ("Sheet3")
`Sheet3 を最初の位置に移動します
worksheet3.MoveToIndex (0)