Bonjour
Modifications de ta macro
Sub Liste2_Liste1()
[f2].Resize(2000).ClearContents
a = Range("A2:A" & [A65000].End(xlUp).Row)
Set MonDico1 = CreateObject("Scripting.Dictionary")
For Each c In a
MonDico1(c) = ""
Next c
b = Range("C2:C" & [C65000].End(xlUp).Row)
Set mondico2 = CreateObject("Scripting.Dictionary")
For Each c In b
If Not MonDico1.exists(c) Then mondico2(c) = ""
Next c
If mondico2.Count > 0 Then
[f2].Resize(mondico2.Count, 1) = Application.Transpose(mondico2.keys)
End If
End Sub