C++ SFML & GTK+

 // Creating SFML View.

    GdkEventMask mask;
    mask = GDK_ALL_EVENTS_MASK;

    gtk_widget_set_events(area, mask);
    gtk_widget_set_can_focus(area, true);
    gtk_widget_set_size_request(area, VIEW_S, VIEW_S);
    gtk_widget_realize(area);
    gtk_widget_set_double_buffered(area, false);
    gdk_window_resize(area->window, VIEW_S, VIEW_S);


    #ifdef _WIN32
    Win.create(sf::WindowHandle(GDK_WINDOW_HWND(area->window)));
    #else
    Win.create(sf::WindowHandle(GDK_WINDOW_XID(area->window)));
    #endif