I've developped an application which imports data from excel. In win XP
excel XP everithing works ok, but in win 98 excel 2000, the Excel doesnt't
close after the automation. The code I use:

'Creating the instance
Dim xlApplication As Object = CreateObject("Excel.Application")
xlAplicacion.Visible = False
Dim xlWorkbook = xlAplicacion.Workbooks.Open(ExcelFile)
Dim xlSheet= CreateObject("Excel.sheet")
xlSheet = xlWorkbook.Worksheets("Sheet1")

xlSheet = Nothing
xlWorkbook = Nothing
xlApplication = Nothing

If you have the answer, don't hesitate to tell it to me TIA