Android Question Change background / focusring color

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
    Private pn As Panel
End Sub

Sub Activity_Create(FirstTime As Boolean)

    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
    pn.Initialize("pn")
    Activity.AddView(pn, 10dip,10dip, 100dip,100dip)

    Dim cd As ColorDrawable
    cd.Initialize(Colors.Red, 0)
    pn.Background=cd
End Sub

Sub pn_Click
    Dim cd As ColorDrawable
    cd.Initialize(Colors.Red, 20dip)
    pn.Background=cd 
End Sub