XtAppError(), XtAppSetErrorHandler(), XtAppSetWarningHandler(), XtAppWarning() - low-level error handlers
void XtAppError (XtAppContext app_context, String message)
void XtAppSetErrorHandler (XtAppContext app_context,
XtErrorHandler handler)
void XtAppSetWarningHandler (XtAppContext app_context,
XtErrorHandler handler)
void XtAppWarning (XtAppContext app_context, String message)
The XtAppError(3) function calls the installed error procedure and passes the specified message.
The XtAppSetErrorHandler(3) function registers the specified procedure, which is called when a fatal error condition occurs.
The XtAppSetWarningHandler(3) registers the specified procedure, which is called when a nonfatal error condition occurs.
The XtAppWarning(3) function calls the installed nonfatal error procedure and passes the specified message.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface