Conversion fichier

Private Sub ChoixFicCsv()
Dim dossier As FileDialog
ChoixChemin = ActiveWorkbook.Path & Application.PathSeparator
   Set dossier = Application.FileDialog(msoFileDialogFilePicker)
      With dossier
         .AllowMultiSelect = False
         .InitialFileName = ChoixChemin
         .Title = "Choix d'un fichier CSV"
         .Filters.Clear
         .Filters.Add "Fichier Csv ", "*.csv", 1
            If .Show = -1 Then
               Chemin = .SelectedItems(1)
               LireTxt Chemin
            End If
      End With
   Set dossier = Nothing
End Sub

Private Sub LireTxt(NomFichier)
Dim Ar() As String
   With Application
      .ScreenUpdating = False
      .EnableEvents = False
      .Calculation = xlManual
   End With
Feuil1.Select
Cells.Select
Selection.ClearContents
'Sep = vbTab
'Sep = "|"
'Sep = ";"
Sep = ","
Lig = 1
' -----------------------------------------
    Open NomFichier For Input As #1
        Do While Not EOF(1)
            Line Input #1, Chaine
               Ar = Split(Chaine, Sep)
               Col = 1
                  For X = LBound(Ar) To UBound(Ar)
                     Cells(Lig, Col) = Ar(X)
                     Col = Col + 1
                  Next
            Lig = Lig + 1
        Loop
    Close #1
' -----------------------------------------
   With Application
      .ScreenUpdating = True
      .Calculation = xlCalculationAutomatic
      .EnableEvents = True
      .CutCopyMode = False
      .Goto [A1], True
   End With
End Sub