New Post: How to open http_listener (error -> Address 'http://www.somesite.com/' is already in use)

Hello

i always getting error that address is in use when using this code

void ListenerOpen()
{
    try {
        web::http::experimental::listener::http_listener listener(L"http://www.google.com/");
        listener.support(([&](web::http::http_request request){ request.reply(web::http::status_codes::OK, U("Hello, World!"));  }));
        listener.open().wait();
        }
    catch (std::exception &e) {
        std::cout << "caught error: " << e.what() << std::endl; cin.get();
    }
}

error appear when i try to open listener.

Do you have some advice, or some good link to know why is this happen?