Q: I would like to know whether PDFTron sdk can extract vector graphics information. E.g. If there appears a table in the PDF file, the table borders are most likely constructed as Path objects. So I want to know if your library can extract this type of vector graphics. If so, is there any example code around?
Yes, this is possible using ElementReader class.
More specifically you may want to take a look at ElementReaderAdv sample (http://www.pdftron.com/pdfnet/samplecode.html#ElementReaderAdv):