video viewer please very very important

["Andrea Leonardi" <andrea leonardi-net it>]

Dear all
We are writing an apps to view a video. This video
is loaded from a file and it's stored like RGB
sequence without header.
We made a window, and inside a loop we made a
drawing area but we can't update it: 

window=gtk_window_new(GTK_WINDOW_TOPLEVEL); 

for(int i=0;i<250;i++)
      {
fin.read((gchar*)rgbbuf,IMAGE_WIDTH*IMAGE_HEIGHT*3); 

darea=gtk_drawing_area_new();
gtk_widget_set_size_request(darea,IMAGE_WIDTH,IMAGE_HEIGHT); 

gtk_signal_connect(GTK_OBJECT(darea),"expose-event",GTK_SIGNAL_FUNC(on_darea 
_expose),NULL); 

gtk_widget_show_all(window); 

gtk_widget_destroy(darea);
} 

with the on_darea_expose function like this: 

gboolean on_darea_expose(GtkWidget
*widget,GdkEventExpose *event, gpointer user_data)
{
gdk_draw_rgb_image(widget->window,widget->style->fg_gc[GTK_STATE_NORMAL],0,0 
,IMAGE_WIDTH,IMAGE_HEIGHT,GDK_RGB_DITHER_MAX,rgbbuf,IMAGE_WIDTH*3); 

return TRUE;
} 

gtk_container_add(GTK_CONTAINER(window),darea); 


thanks a lot for your help..