title: IsNull in VB6 and VB.net
body: <p>I have a code -<br></p>
  
  <pre><code>strTest="    "    
  IsNull(Trim(strTest)) 
  </code></pre>
  
  <p>It returns <strong>False</strong> in VB6 .<br><br>
  I write this code to VB.net 
  but </p>
  
  <blockquote>
    <p>IsNull(Trim(strTest))</p>
  </blockquote>
  
  <p>returns <strong>True</strong> .<Br>
  So,
  <strong>IsNull(Trim("    "))</strong>  in VB6 = <strong>??</strong> in VB.net<br>
  Thank you. </p>