title: Export to excel file when use MFC
body: <p>Now i'm want to export data to excel,and i follow step in this
  <a href="http://support.microsoft.com/default.aspx?scid=kb;en-us;192348" rel="nofollow">http://support.microsoft.com/default.aspx?scid=kb;en-us;192348</a>
  but in step 9 when i add new class in MS visual 2010 it's only have "Microsoft Excel 14.0 Object Library" and it have many interface to generate a new class.I don't know choose what interface,because i can't find excel8 or same that.
  Thanks for your help.</p>