Monitoring Event Handlers
The Event Handlers tab in the Monitor window enables you to monitor Real-Time Designer event handlers:
When you select an event handler in the Navigation pane, the Recent Time Triggered property is displayed for it in the Contents pane. This property is read-only.
If an event is triggered while this tab of the Monitor window is open, the event handler in the Navigation pane flashes green for five seconds to indicate that this event is alive. For example, the following window shows events as they flash green, because both are triggered by the same event.