Rainald said:
Ilya Koulchin shared these words of wisdom:
Where could I obtain this IFilter for PDFs?
I do not believe Microsoft publishes a filter for PDFs. You can try
Adobe, or maybe some of the other third party sites.
To answer your other question:
"IFilter" is an interface defined by the indexing service that provides
applications with a standard way of asking "what's in this random file
that I found lying on your drive", without having to know anything about
the file format. To make this work all the publishers of various file
formats need to implement a dll that exports the interface and knows
about their particular file format. A different application (such as
WDS) can then go and ask the operating system "please load the IFilter
for this particular file", which then allows it to extract the content
and do whatever it likes with it.
Ilya