OnDisconnect is a TNotifyEvent event handler property used to respond to the notification that occurs after closing the connection for the command handler-enabled client. 

OnDisconnect is triggered in the Disconnect method immediately after termination of the listening thread for the client. 

Applications must assign a procedure to the event handler to allow responding to the event notification. 

Use the OnConnect event handler to respond to notifications prior to opening the peer connection for the client.