title: Masked Text Box - Hide Mask
body: <p>I'm using the WPF Extended Toolkit, and I want to know if it's possible to hide the mask, and then while the user is typing, the MaskedTextBox starts to mask the text.</p>
  
  <p>The default settings is to show the mask as text. For example, mask is </p>
  
  <pre><code> (99)999-9999
  </code></pre>
  
  <p>the default text will be: </p>
  
  <pre><code> (__)___-____
  </code></pre>
  
  <p>I want blank text, like a javascript mask.</p>
  
  <p><strong>Edit:</strong></p>
  
  <p>I already tried changing ClipboardMaskFormat to "ExcludePromptAndLiterals" and "HidePromptOnLeave" to true, but doesn't work.</p>