title: Generate a UNIQUE string made out of numeric / ALPHABET
body: <h1>My Problem</h1>
  
  <ul>
  <li>I don't know any VBA</li>
  <li>Need to generate a string of 12 chars (ALPHA +  numbers , 0-9 , A-Z) <strong>IN</strong> <strong>VBA...</strong></li>
  <li><p><strong>Sample output :</strong></p>
  
  <pre><code>"ADF3V3224K1WQ"
  </code></pre>
  
  <p>(12 characters long , Higher caps Alphabetical letters , and Numeric values aswell).</p></li>
  </ul>
  
  <hr>
  
  <p><strong>Story</strong></p>
  
  <p>I'm having a hard time figuring out how to create a string generator (didn't say it has to be random, but it 100% has to be unique, meaning it has to check for duplications or store existing values), I have no experience with VBA. I already found a similar post here, but it is different then mine, as it does not specifically ask for the string to be 100% unique. (I don't need a very low chance, I need 100% across the board).</p>
  
  <p>Syntax-wise I'm pretty confused, I managed to find where the code behind events are, ie Button presses, so I know where I need to write it, but I have no idea how to check for duplications. (even relying on a time seed that can ensure it will be 100% unique is great).</p>
  
  <p><em>Link to the similar post:</em> <a href="https://stackoverflow.com/questions/22630264/ms-access-visual-basic-generate-random-string-in-text-field">MS Access Visual Basic - generate random string in text field</a></p>