Dim debut
Dim quoi As Boolean
Sub demarre()
debut = Time
quoi = True
chrono
End Sub
Sub arrete()
quoi = False
chrono
End Sub
Sub chrono()
[d4] = Format(Time - debut, "nn:ss")
If quoi = False Then [d4] = 0: Exit Sub
If quoi Then Application.OnTime Now + TimeValue("00:00:01"), "chrono"
End Sub