Windows Forms

.................
'some where in the form
dim thre as new THread(addressof (startstream)
thre.start()

.............
'thread procedure
Sub startstream 
dim img as bitmap
mypacket.screen=img
formatter.serialize(stream,mypacket) 
End Sub

private void someControl_SelectedThingChanged(object sender, EventArgs e)
{
    SomeControl someControl = sender as SomeControl;
    SomeThing selectedThing = someControl.SelectedThing;
    ...
}

private void someControl_SelectedThingChanged(object sender, SelectedThingChangedEventArgs e)
{
    SomeThing selectedThing = e.SelectedThing;
    ...
}