XtAddCallback.3Xt.z(3Xt)



     XtAddCallback(3Xt)  X Version 11 (Release 3)   XtAddCallback(3Xt)



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

     SYNTAX
          void XtAddCallback(w, callback_name, callback, client_data)
                Widget w;
                String callback_name;
                XtCallbackProc callback;
                XtPointer 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;
                XtPointer 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;

     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.

     DESCRIPTION



     Licensed material--property of copyright holder(s)         Page 1



     XtAddCallback(3Xt)  X Version 11 (Release 3)   XtAddCallback(3Xt)



          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(3Xt)
          X Toolkit Intrinsics - C Language Interface
          Xlib - C Language X Interface



































     Licensed material--property of copyright holder(s)         Page 2

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