Thanks NickHK

Allow me to be more specific. I have an application that creates Excel
workbooks in XML form (i.e. what you would get if you saved a workbook
as an Xml Spreadsheet in Excel 2003). This doesn't use the Excel
application as it can just generate the workbooks from XSL templates,
and this part is straightforward, certainly easier than using the
Office COM dlls to do the same thing.

The problem is I then have Excel spreadsheets in Xml format, which
cannot be opened in versions of Excel < 2003. So, I want to convert
these back into the standard .xls format. However, I don't want to
open Excel to do this, because as Microsoft say:

"Server-side components need to be highly reentrant, multi-threaded
COM components with minimum overhead and high throughput for multiple
clients. Office Applications are in almost all respects the exact
opposite."

I was hoping somebody would know about a tool to do this.

Thanks

Chris