Stock dialog buttons return:
YES = -8, NO = -9, OK = -5, CANCEL = -6, CLOSE = -7
-4 if window is closed with Close Window button on Titlebar,
Info(win,"Info Dialog","This is the <b>Info</b> dialog", "You can use <span font='18' color='blue'>Pango markup</span>... Warn(win,.... if Question(win,... then... Error(win,...