Binary Files and Indexing

So we open a binary file get its length and would like to just read in the last 128 bytes of the file for processing. I have the index, now how do I point to that index in the file and read/binary from there? Thanks. Jeff Rubin, CTO & Co-Founder Audiopia Shutup and Listen... http://www.audiopia.com also check out my personal site Brainbyte! http://www.brainbyte.com