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The message-passing order
What happens if an object that receives a message doesn’t handle it?
In this case, HyperCard passes the message to other objects and searches their scripts for a message handler that matches the current message. The order in which HyperCard passes a message to objects is called the message-passing order or the message-passing path.
Initially, HyperCard sends messages to a specific button or field or to the current card. If a button or field doesn’t handle the message, it goes on to the current card. From the current card, the message goes to the following objects, in order:
Version 0.7b1 (March 24, 2022)
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