title: Checking if a value is a member of a list
body: <ul>
  <li>I have to check a piece of user input against a list of items; if the input is in the list of items, then direct the flow one way. If not, direct the flow to another. </li>
  <li>This list is <em>NOT</em> visible on the worksheet itself; it has to be obfuscated under code.</li>
  </ul>
  
  <p>I have thought of two strategies to do this:</p>
  
  <ol>
  <li>Declare as an <code>enum</code> and check if input is part of this <code>enum</code>, although I'm not sure on the syntax for this - do I need to initialise the <code>enum</code> every time I want to use it?</li>
  <li>Declare as an array and check if input is part of this array. </li>
  </ol>
  
  <p>I was wondering for VBA which is better in terms of efficiency and readability?</p>