>>Use Object Browser to pull Excel constants from the type library.
>
>I did that already but I don't have a clue as to which code is the regular Excel worksheet.

I did some macro recording in Excel for SaveAs in different formats and found out following:

For Microsoft Office Excel Workbook (*.xls) FileFormat = xlNormal ( the same as xlWorkbookNormal). It seems that xlWorkbookNormal means the current Excel version file format

For Microsoft Excel 97-2003 & 5.0/95 Workbook (*.xls) FileFormat = xlExcel9795. My take on it, that Excel file format didn't change since Excel 97.

--sb--