Note: This is a work in progress and many formatting issues have been fixed. Read more about the project on the home page.
Handler:
HyperCard sends the newButton
message to a button just after HyperCard creates it.
Although the new button will not have a script with which to respond to the message, any other object along the message-passing path can handle it.
Any return-separated list of built-in commands, user-defined handlers, or keywords that are part of a message or function handler.