Atom state, above;

        state = XInternAtom(display, "_NET_WM_STATE", 1);
        above = XInternAtom(display, "_NET_WM_STATE_ABOVE", 1);
        XChangeProperty(display, window, state, XA_ATOM, 32, PropModeReplace, (unsigned char*)&above, 1);
        XEvent xev;

        xev.xclient.type = ClientMessage;
        xev.xclient.serial = 0;
        xev.xclient.send_event = True;
        xev.xclient.window = window;
        xev.xclient.message_type = state;
        xev.xclient.format = 32;
        xev.xclient.data.l[0] = 1;
        xev.xclient.data.l[1] = above;
        xev.xclient.data.l[2] = 0;

        XSendEvent ( display, window, False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);