I already tried that. I think the problem has to do with the
extension. RegisterExtension appears to succeed regardless of the
extension. For instance the API allows you to register .xml but
according to a note in the help center Google search does not index
.xml files. You can register .xml but HandleFile method is never
called; at least not within the couple of minutes i waited to see what
would happen.
Perhaps you should try 'xls' instead of '.xls'.
Hope that will work.
Best regards, Maxim Tebenev.
TrieTech (http://www.trietech.com)