|  | 
              The X server reports
              :mapping-notify
              events to all clients. There is no mechanism to express
              disinterest in this event. The X server generates this event
              type whenever a client application calls one of the following: 
             
              
                request 
              
                Type (member :modifier :keyboard :pointer). Indicates
                the kind of change that occurred--:modifier for a
                successful
                set-modifier-mapping,
                :keyboard for a successful
                change-keyboard-mapping,
                and :pointer for a successful
                set-pointer-mapping. 
              
                start 
              
                Type
                card8.
                If request is :keyboard, then start and
                count indicate the range of altered keycodes. 
              
                count 
              
                Type
                card8.
                If request is :keyboard, then start and
                count indicate the range of altered keycodes.
             |