What happens if an object that receives a message <i>doesn’t  </i>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 <i>message-passing order </i> or the <i>message-passing path.</i>

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:

* the current background
* the current stack
* the stack script of the Home stack
* HyperCard itself