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 mouseDown
message to a button or to a locked field when the user presses the mouse button down and the pointer is inside the rectangle of the button or field.
HyperCard sends mouseDown
to the current card when the user presses the mouse button down and the pointer is not in the rectangle of a button or field.
Any return-separated list of built-in commands, user-defined handlers, or keywords that are part of a message or function handler.