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 | #include <stdlib.h>
#include <gtk/gtk.h>
 
 
GtkWidget * p_entry = NULL;
GtkWidget * p_text  = NULL;
GtkWidget * p_btn   = NULL;
 
 
static void cb (GtkWidget * p_wid, gpointer p_data)
{
   GtkTextBuffer * p_buf = gtk_text_view_get_buffer (GTK_TEXT_VIEW (p_text));
   const gchar    * str   = gtk_entry_get_text (GTK_ENTRY (p_entry));
 
   gtk_text_buffer_set_text (p_buf, str, -1);
 
   (void) p_wid;
   (void) p_data;
}
 
 
int main (int argc, char ** argv)
{
   GtkWidget * p_win    = NULL;
   GtkWidget * p_vbox   = NULL;
 
 
   gtk_init (& argc, & argv);
 
 
   p_win = gtk_window_new           (GTK_WINDOW_TOPLEVEL);
   gtk_window_set_default_size      (GTK_WINDOW (p_win), 640, 480);
   gtk_container_set_border_width   (GTK_CONTAINER (p_win), 5);
   gtk_window_set_position          (GTK_WINDOW (p_win), GTK_WIN_POS_CENTER);
   g_signal_connect                 (p_win, "destroy", gtk_main_quit, NULL);
 
 
   p_vbox = gtk_vbox_new   (FALSE, 5);
   gtk_container_add       (GTK_CONTAINER (p_win), p_vbox);
 
 
   p_entry = gtk_entry_new ();
   p_text  = gtk_text_view_new ();
   p_btn   = gtk_button_new_with_label ("Envoyer...");
 
   gtk_box_pack_start (GTK_BOX (p_vbox), p_entry, TRUE, TRUE, 0);
   gtk_box_pack_start (GTK_BOX (p_vbox), p_text, TRUE, TRUE, 0);
   gtk_box_pack_start (GTK_BOX (p_vbox), p_btn, TRUE, TRUE, 0);
 
   g_signal_connect (G_OBJECT (p_btn), "clicked", G_CALLBACK (cb), NULL);
 
 
   gtk_widget_show_all (p_win);
   gtk_main ();
 
 
   return EXIT_SUCCESS;
} | 
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