Hi,

until today, i used excel 2003 with FileStream and everything worked.
Now i installed excel 2007 and i changed the extention in the code to .xlsx,
but now i get the error:
"the file xyz couldn't be open because the format is wrong etc ..."
(translated)

my code:

Dim objFileStream As FileStream
Dim objStreamWriter As StreamWriter
...
  objFileStream = New FileStream(fileName, FileMode.OpenOrCreate,
FileAccess.Write)
  objStreamWriter = New StreamWriter(objFileStream)
  objStreamWriter.WriteLine("This must be sent to excel"
  objStreamWriter.Close()
  objFileStream.Close()

I suspect i have to install a more recent driver for excel 2007?

Thanks
Tartuffe