title: How to set Transparent TEdit AlphaBlendValue in TEdit
body: <p>I want to make transparent <code>TEdit</code>
  I would use the function <code>AlphaBlendValue</code> but I can not, does anyone have any solution ?, any component that has <code>TEdit</code> with <code>AlphaBlendValue</code>?</p>
  
  <p>Example:</p>
  
  <pre><code>Edit1.AlphaBlend := True;
  Edit1.AlphaBlendValue := 0;
  </code></pre>