title: convert BSTR to const char*
body: <blockquote>
  <p><strong>Possible Duplicates:</strong><br />
  <a href="https://stackoverflow.com/questions/576610/which-is-better-code-for-converting-bstr-parameters-to-ansi-in-c-c">Which is better code for converting BSTR parameters to ANSI in C/C++?</a><br />
  <a href="https://stackoverflow.com/questions/606075/how-to-convert-char-to-bstr">How to convert char * to BSTR?</a></p>
  </blockquote>
  
  <p>How I can convert BSTR to const char*?</p>