Possible to run script when actor is selected in the editor?

I’d like to do something similar to when you select an AmbientSoundActor whereby it displays a sphere to represent audio radius when the user selects the actor (in the world) while in the editor?

Does anyone know if this is possible in Unrealscript?

Edit: So to summarize, I’m looking to call a function in the event of the user selecting a particular actor while in the editor.