Private Sub List_Moyen_Change()
Dim valeur As String
Dim i As Byte
ComboBox2.Clear
valeur = ComboBox1.Value
With Sheets("Bilan")
For i = 2 To .Range("B" & .Rows.Count).End(xlUp).Row
If Left(.Range("B" & i), 3) = Left(ComboBox1.Value, 3) Then ComboBox2.AddItem .Range("B" & i)
Next i
End With
End Sub