Hi all you Celtk users: In my quest to design a beautiful GUI for my app I try to place my widgets in the app window. Therefore I try the following (part of Celtk-based code): (defmodel app-window (window) () (:default-initargs :width (c-in 1000) :height (c-in 600) :kids (c? (the-kids (mk-rectangle :tk-fill "grey" :height 100 :width 200 :parent-y 100 :parent-x 100))))) ... which results in an error saying :PARENT-Y :PARENT-X :HEIGHT are invalid initargs to make-instance of class #<STANDARD-CLASS CTK:RECTANGLE>. The valid initargs are :DISABLEDWIDTH :ACTIVEWIDTH :WIDTH :TAGS :STATE :DISABLEDSTIPPLE :ACTIVESTIPPLE :STIPPLE :DISABLEDOUTLINESTIPPLE :ACTIVEOUTLINESTIPPLE :OUTLINESTIPPLE :DISABLEDOUTLINE :ACTIVEOUTLINE :OUTLINE :OFFSET :DISABLEDFILL :ACTIVEFILL :TK-FILL :DASHOFFSET :DISABLEDDASH :ACTIVEDASH :DASH :DECORATIONS :COORDS :COORDS-TWEAK :L-COORDS :ID-NO :USER-ERRORS :ON-KEY-UP :ON-KEY-DOWN :ON-COMMAND :TIMERS :TK-CLASS :MD-NAME :ID :VALUE :AWAKEN-ON-INIT-P :FM-PARENT. [Condition of type PROGRAM-ERROR] Hm - now, that means I can't really say I want a specific height for a rectangle?! Also, I can't place this rectangle... Trying this with a label works Ok. How can that be? Any pointers really appreciated. Frank