NAME

       XClientMessageEvent - ClientMessage event structure

STRUCTURES

       The structure for ClientMessage events contains:

       typedef struct {
               int type;       /* ClientMessage */
               unsigned long serial;           /* # of last request processed by server */
               Bool send_event;                /* true if this came from a SendEvent request */
               Display *display;               /* Display the event was read from */
               Window window;
               Atom message_type;
               int format;
               union {
                       char b[20];
                       short s[10];
                       long l[5];
                       } data;
       } XClientMessageEvent;

       When you receive this event, the structure members are set as follows.

       The  type  member is set to the event type constant name that uniquely identifies it.  For
       example, when the X server reports a GraphicsExpose event  to  a  client  application,  it
       sends  an  XGraphicsExposeEvent structure with the type member set to GraphicsExpose.  The
       display member is set to a pointer to the display the event was read on.   The  send_event
       member  is  set  to  True if the event came from a SendEvent protocol request.  The serial
       member is set from the serial number reported in the protocol but expanded from the 16-bit
       least-significant  bits  to  a  full 32-bit value.  The window member is set to the window
       that is most useful to toolkit dispatchers.

       The message_type member is  set  to  an  atom  that  indicates  how  the  data  should  be
       interpreted  by  the  receiving  client.   The  format  member  is set to 8, 16, or 32 and
       specifies whether the data should be viewed as a list of bytes,  shorts,  or  longs.   The
       data  member  is  a  union that contains the members b, s, and l.  The b, s, and l members
       represent data of twenty  8-bit  values,  ten  16-bit  values,  and  five  32-bit  values.
       Particular  message  types might not make use of all these values.  The X server places no
       interpretation on the values in the window, message_type, or data members.

SEE ALSO

       XAnyEvent(3),      XButtonEvent(3),       XCreateWindowEvent(3),       XCirculateEvent(3),
       XCirculateRequestEvent(3),              XColormapEvent(3),             XConfigureEvent(3),
       XConfigureRequestEvent(3),  XCrossingEvent(3),   XDestroyWindowEvent(3),   XErrorEvent(3),
       XExposeEvent(3),    XFocusChangeEvent(3),    XGraphicsExposeEvent(3),    XGravityEvent(3),
       XKeymapEvent(3), XMapEvent(3), XMapRequestEvent(3), XPropertyEvent(3),  XReparentEvent(3),
       XResizeRequestEvent(3),            XSelectionClearEvent(3),            XSelectionEvent(3),
       XSelectionRequestEvent(3), XUnmapEvent(3), XVisibilityEvent(3)
       Xlib - C Language X Interface