I have re-created some web queries so that Excel spreadsheets that result from the queries are created using XML rather than POI. I have the spitting image of the POI output except for a minor detail. When the spreadsheet is opened and the user decides to save it using "File: Save As", the default file type for the "Save As" is XML. The user would like the default to be XLS. Is there a way to change the default file type to XLS via the XML code?