If necessary you can run code after your interface's windows have been created but before they are displayed on screen. Do this by supplying create-callback for your interface. For example:
(defun make-text (self createdp)
(multiple-value-bind (s m h dd mm yy)
(format nil "Window ~S ~:[displayed~;created~] at ~2,'0D:~2,'0D:~2,'0D"
self createdp h m s)))
(let ((editor (make-instance 'editor-pane
:text "Not created yet.")))
(setf (editor-pane-text editor)
(make-text self t))))))
Also, if you need to run code at display time you may define a
method on the generic function
. Your method will run just before or just after your interface is displayed on screen.