Where messages are sent initially

HyperCard automatically sends system messages and a few commands to one of three objects: a specific button, a specific field, or the current card. If none of these objects handles the message, it continues along the message-passing order until it reaches HyperCard itself.

The commands HyperCard sends automatically deal with keyboard events and menu events.

Click an object to see the messages it can receive from HyperCard.

Buttons

The following system messages are initially sent to a specific button:

deleteButton

mouseDoubleClick

mouseDown

mouseEnter

mouseLeave

mouseStillDown

mouseUp

mouseWithin

newButton

Fields

The following commands (in bold) and system messages are initially sent to a specific field:

closeField, commandKeyDown,

deleteField, enterInField,

exitField, keyDown,

mouseDoubleClick, mouseDown, mouseEnter,

mouseLeave, mouseStillDown,

mouseUp, mouseWithin,

newField, openField,

returnInField, tabKey

The current card

The following commands (in bold) and system messages are initially sent to the current card:

appleEvent, arrowKey, choose, close, closeBackground, closeCard, closeStack, commandKeyDown, controlKey, deleteBackground, deleteCard, deleteStack, doMenu, enterKey, functionKey, help, hide, idle, keyDown, mouseDoubleClick, mouseDown, mouseStillDown, mouseUp, moveWindow, newBackground, newCard, newStack, openBackground, openCard, openStack, quit, resume, resumeStack, returnKey, show, sizeWindow, startUp, suspend, suspendStack, tabKey

Where messages are sent initially

Buttons

Fields

The current card

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