ImplicitIOHandler is a read-only Boolean property that indicates if the IOHandler for the server was created as as result of the server becoming Active. ImplicitIOHandler will contain True when an object instance is assigned during activation of the server. ImplicitIOHandler will contain False when the server IOHandler has been expressedly assigned by the application. 

ImplicitIOHandler is used in the Destroy destructor to determine if the object instance must free the resources allocated in server IOHandler prior to destruction.

Active 

Destroy 

IOHandler