title: How to resize all user control when parent user control resized
body: <p>How to resize all user control when parent user control resized</p>
  
  <p>Application has one parent user control,  which can be resized to make it small and large.
  now but the same user control has 3/4 more user control. Two user controls has no size as fixed, but they are dynamically do some drawing.</p>