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                Selected by: 
              
                :substructure-redirect on parent.
             
              The
              :configure-request
              event is generated when a client program sets the x,
              y, width, height, border-width or
              stacking priority attributes of a window that has the
              override-redirect attribute :off. 
             
              
                parent, event-window 
              
                Type
                window.
                The window receiving the event. The receiving client must have
                selected :substructure-redirect on this window. 
              
                window 
              
                Type
                window.
                The window to be reconfigured. 
              
                x 
              
                Type
                int16.
                x and y specify the requested upper-left corner
                position of the window relative to the parent. If
                either x or y is not specified in the
                value-mask, then it is set to the current window position. 
              
                y 
              
                Type
                int16.
                x and y specify the requested upper-left corner
                position of the window relative to the parent.
                If either x or y is not specified in the
                value-mask, then it is set to the current window
                position. 
              
                width, height 
              
                Type
                card16.
                width and height specify the requested size of
                the window interior. If either width or
                height is not specified in the value-mask, then
                it is set to the current window size. 
              
                border-width 
              
                Type
                card16
                The requested window border width. If
                border-width is not specified in the value-mask,
                then it is set to the current window border-width. 
              
                stack-mode 
              
                Type (member :above :below :top-if :bottom-if
                :opposite). stack-mode and above-sibling
                specify the requested stacking priority of the window.
                If stack-mode is not specified in the
                value-mask, then it is set to :above. 
              
                above-sibling 
              
                Type (or null window). stack-mode and
                above-sibling specify the requested stacking priority
                of the window. If above-sibling is not specified
                in the value-mask, then it is set to nil. 
              
                value-mask 
              
                Type
                mask16.
                Specifies the changed window attributes contained in
                the redirected client request. Each 1 bit specifies that the
                corresponding attribute was changed.
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