l Target object inherits from nsSupportsWeakReference • nsISupportsWeakReference – creates a “proxy” object which knows when target object is deleted l Holder of weak reference has a nsWeakPtr // get a weak version of a pointer nsWeakPtr weakSample = do_GetWeakReference(sample); // later, check if it is still there: nsCOMPtr<nsISample> sample2 = do_QueryReferent(weakSample);
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	Alec Flett
					2/11/2002