Bonjour dans le code de ta feuil
met ce code
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
If Not Application.Intersect(Target, Range("C18")) Is Nothing Then
Target.Interior.ColorIndex = 1
End If
End Sub
si tu veux que cela marche pour d'autre case
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
If Not Application.Intersect(Target, Range("C18, C20, C22, ... etc")) Is Nothing Then
Target.Interior.ColorIndex = 1
End If
End Sub