 drags the layer with the mouse, it is 
  not generated when you set the <a href="../../TPositionedLayer/Properties/Location.htm">Location</a> 
  property explicitly. It is called before <a href="OnResizing.htm">OnResizing</a> and proportional resizing (<em>roProportional</em> in <a href="../Properties/Options.htm">Options</a>).</p>
<p class="Body"><span class="EmptyRef">OldLocation</span> specifies location of 
  the layer before the user started dragging it.</p>
<p class="Body"><span class="EmptyRef">NewL