exporting to Excel at runtime using System.IO.MemoryStream

I have the following code below that I pulled from export to PDF at runtime, and just changed the memorystream to excel from PDF.
I do not see anywhere to put any options like autofit columns.

This works when a user clicks on the open report in excel button, but no format options.
Is there a better approach to this or is there format options I can do with the below code?
 


  Dim report As New Screen_CostsSummarySheetNewNoDates
                            Dim connectionInfo As New ConnectionInfo()

                            connectionInfo.DatabaseName = "LaborSheets"
                            connectionInfo.UserID =
                            connectionInfo.Password =
                            SetDBLogonForReport(connectionInfo, report)
                            Dim JobHolder = report.ParameterFields("JobNumberHolder")
                            JobHolder.CurrentValues.AddValue(JobNumberHolder)
                            Dim InvoiceNumberHold = report.ParameterFields("TAXBRACKET")
                            InvoiceNumberHold.CurrentValues.AddValue(TaxBox_Daily.Text)


                            Dim s As System.IO.MemoryStream = report.ExportToStream(ExportFormatType.ExcelWorkbook)
                            Dim fs As System.IO.FileStream
                            Dim w As System.IO.BinaryWriter


                            fs = New System.IO.FileStream("C:\Temp\Cost Summary Sheet ALL Dates for " & JLabel.Text & ".xlsx", IO.FileMode.OpenOrCreate)
                            w = New System.IO.BinaryWriter(fs)
                            w.Seek(0, System.IO.SeekOrigin.Begin)
                            w.Write(s.ToArray)
                            w.Close()
                            fs.Close()
                            System.Diagnostics.Process.Start(fs.Name)
                            s = Nothing
                            fs = Nothing
                            w = Nothing