dOPC Client Toolkit Help file
TdOPCSvr Events
TdOPCSvr Events
TdOPCSvr Events 
OnConnect is generated when a connection has been established with an OPC server. 
See TOnOPCDataChangeEvent
OnDisconnect is generated after a disconnect from an OPC server. 
OnError is generated if any error occurred on the OPC server. 
OnServerShutdown is generated when the OPC server plans to shut down. 
OnTimeout is generated when the connection to the OPC server has timed out.
The value of property KeepAlive must greater than zero 
OnWriteComplete is triggered if an AsyncWrite completes successfully. 
OnWriteError is triggered if an AsyncWrite fails. 
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