Bonjour,
Il faut changer le format des cellules. Mettre au format "Texte" :
Sub Remplace()
Dim Plage As Range
Dim Cel As Range
With Worksheets("Feuil3")
Set Plage = .Range(.Cells(1, 1), .Cells(.Rows.Count, 1).End(xlUp))
End With
For Each Cel In Plage
Cel.NumberFormat = "@"
Cel.Value = replace(Cel.Value, ",", ".")
Next Cel
End Sub
Hervé.