title: c#: show tooltip on subitem
body: <p>I have a listview, and in one of the columns (not the first) I want to display an error code. </p>
  
  <p>What I haven't been able to do is get the ToolTip to display. I have</p>
  
  <pre><code>this.lstList.ShowItemToolTips = true;
  ...
  ListViewItem value = lstList.Items.Add(name, name, 0);
  ...
  if (lstList.Columns.Contains(lstColErrorCode))
  {                                
    value.SubItems.Add(new ListViewItem.ListViewSubItem(value, errorCode.ToString()));
    value.ToolTipText = errorCode.ToString("X");
  }
  </code></pre>
  
  <p>I would like to get the hex value of the code to be shown on the tooltip above the decimal value, but it shows above the name.</p>
  
  <p>I haven't been able to get anything I tried to work (like trying to get the coordinates of the subitem). I would appreciate any suggestion.</p>