title: How to stop a detached process in qt?
body: <p>After starting a process with <code>QProcess::startDetached</code>, how can I stop it later?</p>
  
  <p>Say the main program runs, then starts the detached process, which runs independently. The user closes the main program, then later opens it up again and wants to stop the process. How would I find the process and then stop it?</p>