title: Count specific Column in a ListBox
body: <p>Is there any way that I can count how many items there are in a specific column of a ListBox?</p>
  
  <p>e.g.</p>
  
  <pre><code>A     B     C     D
  -------------------
  a     b     c     
  a           c     
  a                
  a                 d
  a           c     d
  a           c     d
  </code></pre>
  
  <p>A = 6</p>
  
  <p>B = 1</p>
  
  <p>C = 4</p>
  
  <p>D = 3</p>
  
  <p>I only need to count how many items in Column D for example (not all four).</p>