title: capturing pressed keys in c++ windows application
body: <p>i would like to know which keys are pressed in my c++/windows application.</p>
  
  <p>what should i put inside <code>WM_KEYDOWN</code>?</p>
  
  <pre><code>switch (message)
      {
         case WM_KEYDOWN:
             // for example, what should i write to know if "F" key was pressed?
      }
  </code></pre>
  
  <p>thank you!</p>