DataHub APIs for C++, Java, and .NET : Version 6.4
	Callback Methods

`onError`

onError — a virtual method invoked on receipt of an error message.

Syntax

virtual void onError ( ST_STATUS   status, 
  LPCTSTR   err_str, 
  LPCTSTR   cmd, 
  LPCTSTR   parms);

virtual void onError ( int   status, 
  String   err_str, 
  String   cmd, 
  String   parms);

status: The status code returned by the DataHub.
err_str: The error string, providing more detailed information about the error.
cmd: The original command sent to the DataHub to which this reply corresponds.
parms: The list of parameters sent as part of the command, as a single space-separated string, or NULL^[12] if none are returned. If the command involved multiple parameters, the list may be truncated.

This virtual method is invoked on receipt of an error message.


onConnectionSuccess		onPointChange