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


NAME
       XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemove
       Callbacks, 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 proce
		 dure 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



X Version 11		   Release 6.1				1





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


       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 call
       back 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		   Release 6.1				2


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