XtAddCallback(3X11)     COMMAND REFERENCE     XtAddCallback(3X11)



NAME
     XtAddCallback, XtAddCallbacks, XtRemoveCallback,
     XtRemoveCallbacks, XtRemoveAllCallbacks - add and remove
     callback procedures

SYNOPSIS
     void XtAddCallback(w, callback_name, callback, client_data)
           Widget w;
           String callback_name;
           XtCallbackProc callback;
           caddr_t client_data;

     void XtAddCallbacks(w, callback_name, callbacks)
           Widget w;
           String callback_name;
           XtCallbackList callbacks;

     void XtRemoveCallback(w, callback_name, callback,
     client_data)
           Widget w;
           String callback_name;
           XtCallbackProc callback;
           caddr_t client_data;

     void XtRemoveCallbacks(w, callback_name, callbacks)
           Widget w;
           String callback_name;
           XtCallbackList callbacks;

     void XtRemoveAllCallbacks(w, callback_name)
           Widget w;
           String callback_name;

     This is user-contributed.

ARGUMENTS
     callback  Specifies the callback procedure.

     callbacks Specifies the null-terminated list of callback
               procedures and corresponding client data.

     callback_name
               Specifies the callback list to which the procedure
               is to be appended or deleted.

     client_data
               Specifies the argument that is to be passed to the
               specified procedure when it is invoked by
               XtCallbacks or NULL, or the client data to match
               on the registered callback procedures.

     w         Specifies the widget.



X Version 11            1 September 1988                        1

XtAddCallback(3X11)     COMMAND REFERENCE     XtAddCallback(3X11)



DESCRIPTION
     The XtAddCallback function adds the specified callback
     procedure to the specified widget's callback list.

     The XtAddCallbacks add the specified list of callbacks to
     the specified widget's callback list.

     The XtRemoveCallback function removes a callback only if
     both the procedure and the client data match.

     The XtRemoveCallbacks function removes the specified
     callback procedures from the specified widget's callback
     list.

     The XtRemoveAllCallbacks function removes all the callback
     procedures from the specified widget's callback list.

SEE ALSO
     XtCallCallbacks(3x11)
     X Toolkit Intrinsics - C Language Interface
     Xlib - C Language X Interface


































X Version 11            1 September 1988                        2

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