title: How may I add additional data for each existing item in a `TListView`?
body: <p>I'm working with <code>TListView</code> and I have successfully populated each item's caption and first subitem. See example below.   </p>
  
  <pre><code>user   pass   working status  valid 
  data1  pass   ---               ---
  data2  pass2 ----              -----
  -
  -
  -
  </code></pre>
  
  <p>After populating each item, I acquire additional data for each item. I want to add this data to populate each item's 'working', 'status', and 'valid' columns. How may I add this additional data for each item?</p>
  
  <p>Each time I have tried, it appears the data is being stored in new items and displayed below the original items. See example below. </p>
  
  <pre><code>user   pass   working status  valid 
  data1  pass   ---               ---
  data2  pass2 ----              -----
         yes   2009
         no 
  </code></pre>
  
  <p>How may I add additional data for each existing item in a <code>TListView</code>?</p>