DISPLAY-WINDOW     => win
CLOSE-WINDOW          win
GET-CALLBACK
SET-CALLBACK
GET-PARAM             win :thickness :{fore,back}ground :{filled,closed}p
SET-PARAM             win param value
INVALIDATE
CLEAR                 win => nil
DRAW-WINDOW
DRAW-POLYGON          win points => nil points := '(x1 y1 x2 y2 ...)
DRAW-CIRCLE           win x y r  => nil
DRAW-STRING
GET-STRING-EXTENT 
GET-IMAGE-EXTENT
RAW-IMAGE
MAKE-OFFSCREEN-WINDOW