Can I use PDFNet SDK to extract text from PDF and for indexing?

Q: I 'm working on an online library project. The customer has lot of
books and they want put this books on their Interanet network that all
of the doctors can search and open book from their computer inside
hospital. One of the features that they need is to search inside the
library 's book. I mean there are lot of Pdf files which they has to
be indexed into database then when a doctor is searching we can find
which book has this Phrases inside. So I want to know that PDFNet SDK
can support such a functionality or not?
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A: You can use PDFNet SDK (http://www.pdftron.com/pdfnet) for any type
of processing on PDF documents.

As a starting point you may want to take a look at TextExtract sample
project:
  http://www.pdftron.com/pdfnet/samplecode.html#TextExtract

In case you are looking for interactive viewing, text search, and
highlighting you may want to take a look at:
  PDFViewSimple: http://www.pdftron.com/pdfnet/samplecode.html#PDFViewSimple
  PDFView: http://www.pdftron.com/pdfnet/samplecode.html#PDFView