For lgLig = 1 To Dline
If .Range("A" & lgLig).Value = UserForm1.ComboBox1.Text And _
.Range("B" & lgLig).Value = UserForm1.ComboBox2.Text And _
.Range("C" & lgLig).Value = UserForm1.ComboBox3.Text And _
.Range("E" & lgLig).Value = UserForm1.ComboBox4.Text And _
.Range("F" & lgLig).Value Like strlettre & "*" Then
num = CLng(Replace(.Range("F" & lgLig).Value, strlettre, ""))
If num > nummax Then nummax = num
End If
Next lgLig