How to pass a window handle to SDL-directfb backend....?


I am new to SDL. I need to draw to a window(a GdkWindow *) by using
SDL(directfb). I have seen an environment var SDL_Windowhack(WINDOW_ID) for
other implementations like X11 and win32. I couldn’t find a similar variable
in directfb implementation. How can i tell SDL-directfb that i need to get
the drawing done in that particular GTK window…?? My application is using
GTK-DirectFB port, so i can create windows(like gtk_drawing_area) for
drawing purposes. Any suggestions on this will be of great importance to me.