title: Windev : "Null" Value in DataBase
body: <p>I have a problem with <strong>Null</strong> Value.</p>
  <p>I Explain.  Here is the below code :</p>
  <blockquote>
  <p>ChnToto is a chain</p>
  <p>ChnToto = Null</p>
  </blockquote>
  <p>On debugging, we find that Windev has stored a &quot;0&quot; (zero) in &quot;ChnToto&quot;.</p>
  <p>I totally lose the initial information (=&gt; &quot;Null&quot;).</p>
  <p>How to force the compiler to keep this information without having to use the &quot;Variant&quot; type?</p>
  <p>I feel that you have to go through a complex variable, or a class.</p>
  <p>Thanks for your advices or ideas</p>