How can I scroll my gtk application window programmically?

["ying lcs" <yinglcs gmail com>]

Hi,

I would like to know how can I scroll my gtk application window programmically?

I have tried this, but the scroll bar does not make and the content of
the window did not get refresh?

GtkWidget* topLevelWindow;
 GdkWindow* win = topLevelWindow->window;

 gdk_window_scroll (win, 1, 880);


Thank you for any help.