[RESOLVED] How to change back color of combo box when it is clicked?

How do I make the backcolor of a combo box change to red after the user clicks the combo box and makes a selection? Thank you.

vb Code:

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        ComboBox1.BackColor = Color.Red
    End Sub

Thank you very much