Sub Filtrer()
If ActiveCell = "" Then
MsgBox "veuillez selectionner une cellule non vide"
Exit Sub
End If
Nature = Range("C" & ActiveCell.Row)
mois = Cells(5, ActiveCell.Column)
nummois = Format(DateValue("01 " & mois & " 2000"), "m")
With Sheets("Feuil2")
.AutoFilterMode = False
Set zone = .Range("A4").CurrentRegion
zone.AutoFilter Field:=1, Criteria1:=nummois
zone.AutoFilter Field:=2, Criteria1:=Nature
.Activate
End With
End Sub