Hello everybody! I've recently gotten myself into the tangly world of programming, with the specific purpose of making great Mac programs in mind. Right now I'm trying to make a program with functionality that I cannot really seem to find any documentation about. What I need it to do is to look at a specific position in a file (the file is specified by the user) and overwrite whatever letters and numbers which are at that position with new numbers and letters. In C++ and Java there are functions like seek() and write(), and I was wondering if Objective-C and Cocoa have similar functions? Thanks in advance!