title: close form A when open form B
body: <p>I use  </p>
  
  <pre><code>open_from('b'); 
  </code></pre>
  
  <p>in <code>WHEN-BUTTON-PRESSED</code> trigger for open form <code>B</code> from form <code>A</code>.<br>
  how to close form <code>A</code> when I open form <code>B</code> by using <code>WHEN-BUTTON-PRESSED</code> in oracle form builder?  </p>