A message start event is used to activate event sub-processes and can be triggered in one of the following ways:
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With a [Throw message] intermediate event. The [Throw message] event will trigger the corresponding [Message start event] in the same process diagram,
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as well as object or page event. For example, when you click a button or open a right-click menu, a corresponding message is sent to the process of the corresponding object or page.
[Start message] element setup
On the [Start message] element setup page, copy the value of the [Which message event should start the process?] field (Fig. 44) into the [Which message to generate?] field of the corresponding [Throw message] event.
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