




The function confirm-yes-or-no pops up a dialog button containing a message and a 
Yes
 and 
No
 button.
This pops up a dialog box containing a message and the buttons 
Yes
 and 
No
, returns t when the 
Yes
 button is clicked, and nil when the 
No
 button is clicked. The message is obtained by applying the 
format-string
 and the 
format-args
 to the Common Lisp function format. 
This function is actually a convenient version of prompt-for-confirmation, but has the disadvantage that you cannot specify any customization arguments. For more flexibility, use prompt-for-confirmation itself.
(setq pane (capi:contain
(make-instance 'capi:text-input-pane)
:title "Test Interface"))
(when (capi:confirm-yes-or-no "Close ~S?" pane)
(capi:apply-in-pane-process
pane 'capi:quit-interface pane))
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017