Dim XL
Set XL = CreateObject("Excel.Application")
XL.Visible = True
XL.Workbooks.Open "c:\toto.xls" 'à adapter
XL.Application.OnTime Now + TimeValue("00:00:04"), "'C:\toto.xls'!Auto_Ouvrir"
Set XL = Nothing
'--- Ouvre la calculatrice (pour illustrer la reprise en main du script) ---
Dim myShell
Set myShell = CreateObject("WScript.Shell")
myShell.Run "calc" , 1, true