title: How to move multiple selected item from one listbox to another listbox?
body: <p>I have two listboxes named <code>listBox1</code> and <code>listBox2</code> with 4 items (strings) in both listboxes. I can select multiple items from both listboxes. I have also two buttons. </p>
  
  <p>On clicking <code>button1</code>, I have to move multiple selected items from <code>listBox1</code> to <code>listBox2</code>. Similarly, on clicking <code>button2</code>, I have to move multiple selected items from <code>listBox2</code> to <code>listBox1</code>. </p>
  
  <p>How can it be done?</p>