title: What should I install to use namespace Windows::Devices in c++?
body: <p>Now I am going to connect to device using bluetooth, so I have got some source code.
  It uses namespace Windows::Devices, but my visual studio gives me compile error.</p>
  <pre><code>using namespace Windows::Devices;
  </code></pre>
  <p>I guess I have to install some packages additionally, but I am not sure what I have to install.
  If anyone knows, please help me.</p>