title: Detect cursor position in TWebBrowser at edit mode
body: <p>I get selection range like this:</p>
  
  <pre><code>var
    Range: IHTMLTxtRange;
  begin
    if Supports((Document as IHTMLDocument2).selection.createRange,
      IHTMLTxtRange, Range)
  end;
  </code></pre>
  
  <p>TWebBrowser in editing. I need get position of cursor. How I can get its?</p>