Bonjour
Ci-dessous un code à mettre dans ton Usf
Private Sub ComboBox2_Change()
Dim ws As Worksheet
Dim plage As Range, cel As Range
Set ws = Feuil2
Set plage = ws.Range("E2:E" & ws.Range("E" & ws.Rows.Count).End(xlUp).Row)
TextBox4.Value = 0
For Each cel In plage
If CDate(cel.Value) = CDate(ComboBox2.Value) Then TextBox4.Value = TextBox4.Value + ws.Range("D" & cel.Row)
Next
End Sub
Cordialement