Protocol contains the communication protocol of the OPC DA server (coCOM or coXML or coUA).
Delphi
propertyProtocol: tdOPCConnectiontype;
C++
__property tdOPCConnectiontype Protocol;
Remarks
This property is set automatically when the ServerName property is set. If ServerName starts with "http://" or "https://" the protocol is set to coXML. If ServerName starts with "opc.tcp://..." the protocol is set to coUA, otherwise to coCOM.