mr_ped Messages: 826 Registered: November 2005 Location: Czech Republic - Praha
Experienced Contributor
IMHO you can use some MS OLE/COM/Whatever_they_use_now interface to access Excel's functionality and use excel itself for the conversion.
a) you need Excel (windows only)
b) .NET will be probably much better platform to get into such things.
c) I don't follow MS technologies, so I can't help more.
Another longshot may be to try use command line and Open Office calc to convert the files. While I do use Open Office almost daily, I don't know if you can run such conversion from command line or by some other means, sorry.