Teledyne LeCroy UWBTracer Automation Manual - Manual (Page 69)

LeCroy UWBTracer Automation API Reference Manual Manual Version 3.02
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6
Verification Script Engine Events Callback Interface
6.1 _IVScriptEngineEvents dispinterface
To retrieve the event notifications from the UwbAnalyzer application when a verification script engine
object is running a script, you must implement the _IVScriptEngineEvents callback interface.
Because this interface is a default source interface for the IVScriptEngine object, there is a very
simple implementation from such languages as Visual Basic, VBA, VBScript, WSH, etc.
Remarks
Some script engines impose restrictions on handling events from “indirect” automation objects in typeless
script languages (when the automation interface to the object is obtained from a call of some method,
rather than from a creation function – like CreateObject() in VBScript). LeCroy PSG UWBTracer™
provides a special COM class allowing receiving and handling notifications from VSE object, even in
script languages not supporting event handling from "indirect" objects.
(Please refer to
CATCAnalyzerAdapter for details.)
Example
The C++ implementation used in the examples below implements an event sink object by deriving
from IDispEventImpl but not specifying the type library as a template argument. Instead, the type
library and default source interface for the object are determined using
AtlGetObjectSourceInterface() . A SINK_ENTRY() macro is used for each event from each
source interface to be handled: