title: Copy unique list based on criteria in another column vba excel
body: <p>I want to use VBA to extract a unique, ordered list, subject to conditions in another column. So, I have two columns A, B.</p>
  
  <pre><code>A    B
  ========
  a   FALSE
  b   FALSE
  c   TRUE
  a   TRUE
  b   FALSE
  c   TRUE
  </code></pre>
  
  <p>Should result in a list</p>
  
  <pre><code>C
  ==
  a
  c
  </code></pre>
  
  <p>I'm very, very new to VBA, so any help would be appreciated. </p>
  
  <p>Oh, and the second list will be updated with every change to the first, so needs to be wiped to ensure there are no leftovers, if, for example, the second "a" is set to FALSE.</p>