The prompt-for-confirmation function pops up a dialog box with a message and Yes and No buttons.
prompt-for-confirmation
prompt-for-confirmation message &key screen
This pops up a dialog box containing message , with Yes and No buttons. It returns two values:
a boolean indicating whether Yes was pressed
t (for compatibility with other prompt functions)
t
(capi:prompt-for-confirmation "Continue?")
confirm-yes-or-no