title: Part of form to be transparent
body: <p>I have a Form which contains text and buttons.
  I have to make part of the Form to be transparent while the other part remains the same.</p>
  <p>Using BackColor and TransparencyKey same color<br />
  OR
  set opacity.</p>
  <p>Both above ways will affect the whole window. I need to change the part of(small portion)
  of the form.  How can we achieve this ?.</p>