Echelon OpenLNS - Manual (Page 746)

OpenLNS Programmer's Reference 709
your application's main thread. Instead, a separate thread
will be used for this event.
When using the separate thread for these events, you should
perform as little processing as possible within your event
handler. However, you can use the PostMessage() or
PostMessageThread() functions of the Win API to defer these
events to the application's main thread. Consult the Windows
documentation for more information on these functions.
For more information on multi-threading and OpenLNS, see
the Multi-Threading and OpenLNS Applications section in
the OpenLNS Programmer's Guide.
Syntax OnNetworkVariableStringUpdate(monitorTag As Long,
value as String, dataUpdateInfo As Object)
Element Description
monitortag The monitor tag value assigned to
the network variable.
value Current data value of the network
variable.
dataUpdateInfo The DataValue object for this
update.
Added to API Prior to LNS Release 3.0.
OnNetworkVariableUpdate
Summary Indicates that a network variable value has been updated .
You can register for this event by setting the DsMonitorTag
property to a non-zero value.
If you are using a programming environment that cannot
handle Object types being passed as an event parameter, you
should use the OnNetworkVariableStringUpdate event
instead of this one. To use that event, set the ObjectServer
object's Flags property to 1.
Note that if you are using Visual C++, the
OnNetworkVariableUpdate event will not be fired in your
application's main thread. A separate thread will be used for
this event. When using the separate thread for these events,
Echelon recommends that you perform as little processing as
possible within your event handler. However, you can use the
PostMessage() or PostMessageThread() functions of the Win
API to defer these events to the application's main thread.
Consult the Windows documentation for more information on
these functions.
For more information on multi-threading and OpenLNS, see
the Multi-Threading and OpenLNS Applications section in
the OpenLNS Programmer's Guide.