Bonjour tout le monde,
Une proposition par macro.....http://boisgontierjacques.free.fr/pages_site/Doublons.htm
Sub GroupColorColAaColL()
couleurs = Array(1, 3, 4, 6, 7, 8, 14, 15, 17, 20, 22, 24, 26, 27, 28, 33, 34, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 50, 53)
Set mondico = CreateObject("Scripting.Dictionary")
For Each c In Range("a2", [a65000].End(xlUp))
clé = c.Value & c.Offset(, 1) & c.Offset(, 2) & c.Offset(, 3) & c.Offset(, 4) & c.Offset(, 5) & c.Offset(, 6) & c.Offset(, 7) & c.Offset(, 8) & c.Offset(, 9) & c.Offset(, 10) & c.Offset(, 11) & c.Offset(, 12)
mondico.Item(clé) = mondico.Item(clé) + 1
Next c
For Each c In Range("a2", [a65000].End(xlUp))
clé = c.Value & c.Offset(, 1) & c.Offset(, 2) & c.Offset(, 3) & c.Offset(, 4) & c.Offset(, 5) & c.Offset(, 6) & c.Offset(, 7) & c.Offset(, 8) & c.Offset(, 9) & c.Offset(, 10) & c.Offset(, 11) & c.Offset(, 12)
nocoul = (Application.Match(clé, mondico.keys, 0)) Mod UBound(couleurs)
If mondico.Item(clé) > 1 Then c.Resize(, 12).Interior.ColorIndex = couleurs(nocoul)
Next c
End Sub
Cordialement,