Liste déroulante avec saisie automatique

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
  If Not Intersect([e3:e3], Target) Is Nothing And Target.Count = 1 Then
    a = Application.Transpose(Sheets("feuil1").Range("liste").Value)
    Me.ComboBox1.List = a
    Me.ComboBox1.Height = Target.Height + 3
    Me.ComboBox1.Width = Target.Width
    Me.ComboBox1.Top = Target.Top
    Me.ComboBox1.Left = Target.Left
    Me.ComboBox1 = Target
    Me.ComboBox1.Visible = True
    Me.ComboBox1.Activate
    'Me.ComboBox1.DropDown ' ouverture automatique au clic dans la cellule (optionel)
  Else
    Me.ComboBox1.Visible = False
  End If
End Sub

Private Sub ComboBox1_Change()
  If Me.ComboBox1 <> "" And IsError(Application.Match(Me.ComboBox1, a, 0)) Then
     Me.ComboBox1.List = Filter(a, Me.ComboBox1.Text, True, vbTextCompare)
     Me.ComboBox1.DropDown
  Else
    ActiveCell = Me.ComboBox1
  End If
End Sub