Save an Excel Spreadsheet from vb.net

I have a vb.net web app that creates  an Excel spreadsheet. I need to save the spreadsheet then open and display the spreadsheet and delete the file.
I have already coded everyhining but the save, open and display and delete.
The problem with this is besides creating the file it also creates a file like
34D6A000
that contains the spreadsheet also. This is niot wanted becasse when I want to delete the spreadsheet I won't know the files name to delete.
I need the missing code.

Thanks

With myExcel
                .SheetsInNewWorkbook = 1
                myExcelWB = .Workbooks.Add()
                myExcelWS = myExcelWB.Worksheets(1)
                'TO Display the column name in the the excel file.   
                For intColumn = 0 To ds.Tables(0).Columns.Count - 1
                    myExcelWS.Cells(1, intColumn + 1).Value = ds.Tables(0).Columns(intColumn).ColumnName.ToString
                Next
                'For displaying the column value row-by-row in the the excel file.         
                For intRow = 0 To ds.Tables(0).Rows.Count - 1
                    For intColumnValue = 0 To ds.Tables(0).Columns.Count - 1
                        myExcelWS.Cells(intRow + 2, intColumnValue + 1).Value = ds.Tables(0).Rows(intRow).ItemArray(intColumnValue).ToString
                        '                        myExcelWS.Cells(intRow + 1, intColumnValue + 1).Value = ds.Tables(0).Rows(intRow).ItemArray(intColumnValue).ToString
                    Next
                Next
                Dim dtmWorkDate As System.DateTime
 
                strFileName = "ExcelFile_" + fileNameUndex & ".xls"
 
                strFilePath = Application("PDF_Physical_FilePath")
                strExcelFile = strFilePath & strFileName
 
                .ActiveWorkbook().SaveAs(strExcelFile)

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