Hi, I have been working on a UDF for the Enttec DMX USB PRO (www.enttec.com) USB to DMX Dongle. The Device has a FTDI chip from http://www.ftdichip.com. I was having brain implosions while getting my head around all the dll calls and dllstructcreate issues so I went back to basics and decided to write a UDF for the FTDI's FTD2xx.dll Which may be useful to others here, and helped me learn what the dll was requesting. As the UDF is about 2000 lines I have added it as an attachment. I have also i