roshan_iiita 0 Light Poster

I am using OpenCV for my program and i want the window always on the top.
For that purpose i included "gtk/gtk.h" in my source code and using function:

gtk_window_set_keep_above(GTK_WINDOW(cvGetWindowHandle("bfr_del")), TRUE);

but it is not working. ( also not showing any error ) Please help me... i need it urgently.

I am working on Linux.