Retrieves the Uniform Resource Name (URN) of the behavior that fired the event.
HRESULT value = object.put_srcUrn( v);HRESULT value = object.get_srcUrn(* p);
the URN identifier.
This property is set to null unless both of the following conditions are true:
- A behavior currently is attached to the element on which the event is fired.
- The behavior defined in the preceding bullet has specified a URN identifier and fired the event.