salut :
essai
Private Sub UserForm_Initialize()
Dim Sh As Worksheet, LsRow As Long
Set Sh = Sheets("Feuil1")
LsRow = Sh.Cells(Rows.Count, 1).End(xlUp).Row
For r = 2 To LsRow
If Cells(r, 1) = "a" And Cells(r, 2) = "c" And Cells(r, 3) = "d" And Cells(r, 4) = "25/09/2016" Then
ComboBox1.AddItem Cells(r, 5)
End If
Next
End Sub