I am trying to get rid of the black highlight in the field that has focus on my forms.  What I want to do is change the background of the control to a light green, and the text to black.  Where have I gone wrong?

Private Sub Form_GotFocus()
    Dim ctl As Control
    Set ctl = Me.ActiveControl
    If ctl.ControlType = acTextBox Or ctl.ControlType = acComboBox Then
        ctl.BackColor = RGB(144, 238, 144) ' Light Green
        ctl.ForeColor = RGB(0, 0, 0) 'Black text
    End If
End Sub