WinRT support
[High-level GUI]

        void sample_app::MainPage::ShowWindow()
        {
            static cv::String windowName("sample");
            cv::winrt_initContainer(this->cvContainer);
            cv::namedWindow(windowName); // not required

            cv::Mat image = cv::imread("Assets/sample.jpg");
            cv::Mat converted = cv::Mat(image.rows, image.cols, CV_8UC4);
            cv::cvtColor(image, converted, COLOR_BGR2BGRA);
            cv::imshow(windowName, converted); // this will create window if it hasn't been created before

            int state = 42;
            cv::TrackbarCallback callback = [](int pos, void* userdata)
            {
                if (pos == 0) {
                    cv::destroyWindow(windowName);
                }
            };
            cv::TrackbarCallback callbackTwin = [](int pos, void* userdata)
            {
                if (pos >= 70) {
                    cv::destroyAllWindows();
                }
            };
            cv::createTrackbar("Sample trackbar", windowName, &state, 100, callback);
            cv::createTrackbar("Twin brother", windowName, &state, 100, callbackTwin);
        }