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XtAddCallback(3)                                XT FUNCTIONS                                XtAddCallback(3)



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

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

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

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

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

       void XtRemoveAllCallbacks(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
       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



X Version 11                                     libXt 1.0.5                                XtAddCallback(3)