title: How to move a StackPanel in WPF
body: <p>I would like to move a <code>StackPanel</code> horizontally when the user clicks a button.  I'm implementing <code>DoubleAnimation</code> with <code>TargetName</code> and <code>TargetProperty</code>.  But, I don't know which <code>TargetProperty</code> to use.</p>
  
  <p>Can anyone help me?</p>