Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If InStr(Target.Address, "$L$8") Then
choixdate = MsgBox("Voulez-vous modifier la date,", vbCritical + vbYesNo, "Choix date")
Select Case choixdate
Case 6
Target = CDate(InputBox("Nouvelle date?"))
Case Else
Target = Date
End Select
End If
End Sub