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