XtAddCallback

XtAddCallback(3Xt)		 XT FUNCTIONS		   XtAddCallback(3Xt)



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.  or the client data to match on the
		 registered callback procedures

       client_data
		 Specifies the argument that is to be passed to the specified
		 procedure when it is invoked by XtCallbacks or NULL,.

       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 speci-
       fied widget’s callback list.

       The XtRemoveCallback function removes a callback only if both the pro-
       cedure and the client data match.

       The XtRemoveCallbacks function removes the specified callback proce-
       dures 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



							   XtAddCallback(3Xt)