void XtAppErrorMsg (app_context, name, type, class, default, params, num_params) XtAppContext app_context; String name; String type; String class; String default; String params; Cardinal num_params;void XtAppSetErrorMsgHandler (app_context, msg_handler) XtAppContext app_context; XtErrorMsgHandler msg_handler;
void XtAppSetWarningMsgHandler (app_context, msg_handler) XtAppContext app_context; XtErrorMsgHandler msg_handler;
void XtAppWarningMsg (app_context, name, type, class, default, params, num_params) XtAppContext app_context; String name; String type; String class; String default; String params; Cardinal num_params;
The XtAppSetErrorMsgHandler function registers the specified procedure, which is called when a fatal error occurs.
The XtAppSetWarningMsgHandler function registers the specified procedure, which is called when a nonfatal error condition occurs.
The XtAppWarningMsg function calls the high-level error handler and passes the specified information.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface