QuickTime and HyperCard: Closing External Windows (7/92)

Both the Palette XCMD and the Picture XCMD -- and now the Movie XCMD --
will send a message to the current card signaling that a window is closing.
These messages are, respectively, closePalette, closePicture, and
closeMovie.

The parameters sent with the message identify the window that is closing:
The first parameter is the window's name and the second parameter is the
window's ID (window IDs are new in HyperCard 2.1). The message is sent when
the window closes, either via a click in a close box, or by executing a
"close window" statement.

Stack designers can define a closePalette, closePicture, or closeMovie
handler to take care of any cleaning up or updating when a window is
closed.

One restriction: Don't try to close the window again within a
closePalette, closePicture, or closeMovie handler. The script can STILL
refer to the window, for example, getting (or even setting) the window's
location. The script can also close other windows -- but HyperCard will
crash if the script tries to close the window (e.g., close window id (the
param of 2)).

This article is adapted from the Claris Tech Info database.