Internationalization of GTK Apps (change language)

[Madhusudan E <madhusudan huawei com>]

Hi All,
I want my applications to be internationalized.

I have included in my app
#include <glib/gi18n.h>

and 
I have set LC_ALL = "zh_TWBig5"

And I'm using the following way to describe my labels

gtk_label_new ( _("Exit"));

But my app is not reflecting the language changes (to Chinese).

Is there anything more to be done.
Or am I going wrong anywhere.

Rgds,
Madhusudan E