XtErrorHandler()														  XtErrorHandler()

Name
  XtErrorHandler - interface definition for low-level error and warning handler procedures.

Synopsis
  typedef void (*XtErrorHandler)(String);
	 String message;

Inputs
  message   Specifies the error message.

Description
  An  XtErrorHandler  is registered as an error or warning handler with XtAppSetErrorHandler() or XtAppSetWarningHandler().  It is invoked by
  XtAppError() or XtAppError().  The error handler should display the specified string in some appropriate fashion.   Some  applications  may
  wish to log errors to a file as well.  Error handlers should exit; warning handlers should return.

  See XtErrorMsgHandler(2) for a description of the high-level error and warning handler procedure.

Example
  The  Intrinsics  default  error  and	warning handlers are shown below.  The XTERROR_PREFIX and XTWARNING_PREFIX symbols are by default the
  empty string in the MIT implementation, but may be configured when the Intrinsics are compiled.

     void _XtDefaultError(message)
	 String message;
     {
	 extern void exit();

	 (void)fprintf(stderr, "%sError: %s0, XTERROR_PREFIX, message);
	 exit(1);
     }

     void _XtDefaultWarning(message)
	 String message;
     {
	 if (message && *message)
	    (void)fprintf(stderr, "%sWarning: %s0, XTWARNING_PREFIX, message);
	 return;
     }

See Also
  XtAppError(1), XtAppSetErrorHandler(1), XtAppSetWarningHandler(1), XtAppWarning(1),
  XtErrorMsgHandler(1).

Xt - Error Handling														  XtErrorHandler()