Hi,
Can anyone help please.
I am trying to change the save as in Excel through VB.net from a csv type back to an xls. I have attached the code below that i am using but it fails to run with:-

An unhandled exception of type 'System.IO.IOException' occurred in microsoft.visualbasic.dll

Additional information: The process cannot access the file "C:\temp\temp.csv" because it is being used by another process.

My Code:-
excelApp.ActiveWorkbook.SaveAs(Filename:="C:\Temp\Temp.xls", FileFormat:=("xlExcel5"), _
Password:="", WriteResPassword:="", ReadOnlyRecommended:=False, _
CreateBackup:=False)
excelApp.Visible = True

Any help appreciated