title: multiline textbox auto adjust it's height according to the amount of text
body: <p>I have a textbox which can return various strings ranging from 5 characters upto 1000 characters in length. 
  It has the following properties:</p>
  
  <ul>
  <li>multiline = true</li>
  <li>wordwrap = true</li>
  </ul>
  
  <p>Which other properties of the textbox do I need to set to make the following possible?</p>
  
  <ul>
  <li>The width of the box should be fixed</li>
  <li>The height of the box to auto adjust depending on how much text it is returning e.g if the text runs onto 3 lines then it adjusts to 3 lines in height.</li>
  </ul>