barcode: no idea, haven’t done anything with barcode yet, I guess you will have to experiment with the commands you listed in your first post and I guess the specification might be useful too.
blank page seperation: you mean you have a couple of pages and you put a blank page in between and then you put everything in the automatic document feeder and your scan programm makes too different files out of them. well….as far as I know this functin doesn’t exist like this in C. But I will have to tackle this problem too (in probably two weeks time) and my idea was to make a rough check of every scanned page if there is very little text on it and if so then make a histogram of it and somehow decide from the histogram if it is a blank page or just a page with a few words on.
p.s: I think you can stop writing SIR we are not that formal here in this forum 😉