title: C++ CListCtrl - GetItemData always returns 0
body: <p>I am facing an <code>MFC</code> (Microsoft Foundation Class) project on <code>VS2017(x86)</code>.<br>
  Using the function <code>CListCtrl::GetItemData</code>, I always get <code>0</code> value. </p>
  
  <pre><code>CListCtrl             ctl;
  DWORD_PTR             res;
  
  res = ctl.GetItemData(2); 
  </code></pre>
  
  <p>How can I fix this problem?</p>