Transcription: When a user clicks an object, like a graphic, Toolbook sends the button click message to the object. In this example, there is no button click handler in the graphic script, so the message continues to the page. But the page script doesn't have the handler either, so the message continues to the background. The background script does have a button click handler, so the message stops and the script runs. The handler also contains a forward statement, somessage continues up the object hierarchy to the book, then on to the toolbook system.
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