title: how to hide stdout of subprocess on windows
body: <p>I know linux solutions of opening a /dev/null and redirecting stout to it.<br>
  (like <a href="https://stackoverflow.com/questions/9153796/prevent-subprocess-of-subprocess-from-writing-to-stdout">Prevent subprocess of subprocess from writing to stdout</a> or similar ones)<br>
  What is the solution in windows?</p>