title: how to search and highlight pdf's keyword programmatically
body: <p>i've tried two different component to integrate pdf file in windows form application (c#).
  the above mentionated component are PDFSharp and Sloppycode webBrowserEx.
  Now, both of them work fine, but I'm not able to search and highlight programmatically full text defining by user through a textBox.</p>
  
  <p>Can anyone give me some suggest to achieve my purpose? </p>
  
  <p>Thanks in advance.</p>