title: How to open a PDF file?
body: <p>I want to load a pdf file on the click of a button.
  In the OnClickButton() implementation I am writing the function which open the PDF file</p>
  
  <pre><code>ShellExecute(0,
               "Open",
               "%s\\HELP\\RiverCADPro_User_Manual.pdf",
               NULL,
               NULL,
               SW_MAXIMIZE);
  </code></pre>
  
  <p>The above code is not working.What else is to be needed so as to run the above code</p>