F.12 CloseDisplay Hook Functions
XmuAddCloseDisplayHook adds a function that
will be called with the given arguments when
XCloseDisplay() is called.
XmuRemoveCloseDisplayHook deletes the function that
has been added with XmuAddCloseDisplayHook. More than
one such function can be added.
XmuLookupCloseDisplayHook determines if a
function is installed.
These functions use the Display Queue Functions internally, which are described next.
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