Private Sub ListBox1_Click()
curVal = Me.ListBox1.Value
Set c = ActiveWorkbook.Worksheets("Verif_M1").Rows(1).Find(curVal, lookat:=xlWhole)
If c.Offset(1, 0).Value = "" Then Exit Sub
Set Rng = Range(c.Offset(1, 0), c.End(xlDown))
ListBox2.Clear
If Rng.Rows.Count = 1 Then ListBox2.AddItem c.Offset(1, 0).Value
If Rng.Rows.Count > 1 Then ListBox2.List = Application.Transpose(Rng)
End Sub