I've been using B4A going on 4 years and rarely get stumped but this one has me scratching my head. I've got an unencrypted swipe for Driver's Licenses that works on the Audio jack from a company called MagTek. They have also supplied me with a jar file. I've just blown a day trying to figure out how to make it into a library that works in B4A. It is the last part of a much bigger project. I can gladly supply the file or the link to their site for a direct download. Any help would be much appreciated.