TElSSLClient.Open method

    This method causes TElSSLClient to initiate SSL handshake. Call this method after transport has established connection.
    If SSL is not enabled (Enabled property is set to false), TElSSLClient does nothing and returns immediately.
    The method is asynhronous and after its return, the SSL session is not yet established. If SSL is enabled, the application should call DataAvailable in loop until either Active property becomes True or error happens (the application is notified about an error via OnError event). See samples for more details.