title: Why there are three unexpected worker threads when a Win32 console application starts up?
body: <p>Here is the screenshot of the situation!</p>
  
  <p><img src="https://i.stack.imgur.com/aN72i.png" alt="Here is the screenshot!"></p>
  
  <p>I created a Visual C++ Win32 Console Application with VS2010. When I started the application, I found that there were four threads: one 'Main Thread' and three worker threads (I didn't write any code).  </p>
  
  <p>I don't know where these three worker threads came from.<br>
  I would like to know the role of these three threads.</p>
  
  <p>Thanks in advance!</p>