Module Module1 Sub Main() 'Read a .xls file. Dim Wbook = ExcelWorkbook.ReadXLSX("..\..\..\Template.xlsx") 'Write worksheet to DataTable. Dim DT As DataTable DT = Wbook.Worksheets(0).WriteToDataTable() 'Create new workbook. Wbook = New ExcelWorkbook() 'Adds new worksheet. Wbook.Worksheets.Add("sheet1") 'Read data from DataTable. Wbook.Worksheets(0).ReadFromDataTable(DT) ' XLS Wbook.WriteXLS("..\..\..\DataTableImport.xls") ' XLSX Wbook.WriteXLSX("..\..\..\DataTableImport.xlsx") 'Open specified file in MS Excel. System.Diagnostics.Process.Start("..\..\..\DataTableImport.xlsx") End Sub End Module