title: Get highlighted text from active window
body: <p>I would like to know how can I get highlighted text from any window for example: (excel, ie, firefox,…).
  please note that the following message not work in the above application
  WM_GETTEXT,WM_COPY,EM_GETSELTEXT.</p>
  
  <p>I have also tried control C (copy) and get selected text from clipboard but it is not a good idea.</p>
  
  <p>Language used: C#</p>