Bonjour,
A tester sans grande conviction ...
Private Sub ComboBox1_Change()
With ComboBox1
If ComboBox1 = "" Then
.BackColor = &HFF&
Else
.BackColor = &H80000005
End If
End With
End Sub
Private Sub UserForm_Initialize()
With ComboBox1
If ComboBox1 = "" Then
.BackColor = &HFF&
Else
.BackColor = &H80000005
End If
End With
End Sub
Cordialement