XmCommandError — A Command function that displays an error

     #include <Xm/Command.h>
void XmCommandError(
Widget widget,
XmString error);

     XmCommandError displays an error message in the history
area of the Command widget. The XmString error is displayed
until the next command entered occurs.

widget    Specifies the Command widget ID

error     Specifies the passed XmString

     For a complete definition of Command and its associated
resources, see XmCommand(3).