Specifies the nonfatal error message that is to be reported. or the nonfatal error procedure, which usually returns
Specifies the new fatal error procedure, which should not return,.
Specifies the message that is to be reported.
The XtSetErrorHandler function has been superceded by XtAppSetErrorHandler.
The XtSetWarningHandler function has been superceded by XtAppSetWarningHandler.
The XtWarning function has been superceded by XtAppWarning.