XtSetLanguageProc(3Xt)

     NAME
          XtSetLanguageProc - set the language procedure

     SYNTAX
          Widget XtSetLanguageProc(app_context, proc, client_data)
                XtAppContext app_context;
                XtLanguageProc proc;
                XtPointer client_data;

     ARGUMENTS
          app_context
                    Specifies the application context in which the
                    language procedure is to be used, or NULL.

          proc      Specifies the language procedure, or NULL.

          client_data
                    Specifes addional client data to be passed to the
                    language procedure when it is called.

     DESCRIPTION
          XtSetLanguageProc sets the language procedure that will be
          called from XtDisplayInitialize for all subsequent Displays
          initialized in the specified application context. If
          app_context is NULL, the specified language procedure is
          registered in all application contexts created by the
          calling process, including any future application contexts
          that may be created. If proc is NULL a default language
          procedure is registered.  XtSetLanguageProc returns the
          previously registered language procedure. If a language
          procedure has not yet been registered, the return value is
          unspecified but if this return value is used in a subsequent
          call to XtSetLanguageProc, it will bcause the default
          language procedure to be registered.

          The default language procdure does the following:

          o    Sets the locale according to the environment. On ANSI
               C-based systems this is done by calling setlocale(
               LC_ALL, language ). If an error is encountered a
               warning message is issued with XtWarning.

          o    Calls XSupportsLocale to verify that the current locale
               is supported. If the locale is not supported, a warning
               message is issued with XtWarning and the locale is set
               to ``C''.

          o    Calls XSetLocaleModifiers specifying the empty string.

          o    Returns the value of the current locale. On ANSI C-
               based systems this is the return value from a final
               call to setlocal( LC_ALL, NULL ).
          A client wishing to use this mechanism to establish locale
          can do so by calling XtSetLanguageProc prior to
          XtDisplayInitialize.

     SEE ALSO
          X Toolkit Intrinsics - C Language Interface
          Xlib - C Language X Interface