Echelon OpenLNS - Manual (Page 542)

OpenLNS Programmer's Reference 505
Events
The MsgMonitorPoint object contains the following events :
• UpdateErrorEvent
• UpdateEvent
UpdateErrorEvent
Summary Indicates that a write failure or a poll failure has occurred on
the message monitor point that generated the event.
This event can only be used in development environments
that support events being generated on threads other than
the client thread (such as Visual C++). In these
environments, it is usually more efficient to generate events
from a non-client thread.
To cause events to be generated in this manner, create an
object which implements the ILcaNvMonitorPointListener or
ILcaMsgMonitorPointListener interface and call a
MsgMonitorPoint object's Advise method with the created
object as the argument. The object will now receive these
events directly. The behavior of the object depends on how
the user implements the UpdateEvent method.
Syntax UpdateErrorEvent(UpdateType as Integer)
Element Description
updateType This element always returns the value
1.
Data Type Integer.
Added to API LNS Release 3.0.
UpdateEvent
Summary Indicates that a message monitor point update has arrived.
This event can only be used in development environments
that support events being generated on threads other than
the client thread (such as Visual C++). In these
environments, it is usually more efficient to generate events
from a non-client thread.
To cause events to be generated in this manner, create an
object which implements the ILcaNvMonitorPointListener or
ILcaMsgMonitorPointListener interface and call a
MsgMonitorPoint object's Advise method with the created
object as the argument. The object will now receive these
events directly. The behavior of the object depends on how
the user implements the UpdateEvent method.
For completion code messages, the InputDp, OutputDp, and
Src parameters are NULL.
Syntax UpdateErrorEvent(UpdateType as Integer)