




 
The simplest form of dialog is a message dialog. The function 
display-message
 behaves very much like 
format
.
(display-message "Hello world")
 
 
(display-message
"This function is ~S"
'display-message)
Figure 11.2 A second message dialog
 
 
Another simple dialog asks the user a question and returns 
t
 or 
nil
 depending on whether the user has chosen yes or no. This function is 
confirm-yes-or-no
.
(confirm-yes-or-no
"Do you own a pet?")
Figure 11.3 A message dialog prompting for confirmation
 
 
For more control over such a dialiog, use the function 
prompt-for-confirmation
. See the 
LispWorks CAPI Reference Manual
 for details.
CAPI User Guide (Macintosh version) - 30 Aug 2011