Introduced in build 188.8.131.525
Saves a specified Workbook as a BIFF8 format (Excel 97 or later) .xls file.
The current ExcelApplication object which is saving the workbook to file
object representing the workbook to save.
SharePoint List Item to which the file is attached
Specifies a file name for the Workbook. ExcelWriter will save the file as an attachment to the List Item using this name.
If there is a problem creating, opening, or writing to the file specified, or reading from the workbook object.