I have a stand alone application that I would like to be able to send and receive multiplayer info/messages from MSFS2004 and VATSIM. I've downloaded the M$ SDK - but it is of limited use since it doesn't seem to describe the *contents* of the messages/packets. (for example it says that latitutde is a 32bit integer - but how is it encoded?)Does anyone know of any documentation or source code that captures these messages... I know I could use a packet sniffer, but I would like to avoid the pain of figuring it all out. I know that, for example, VATSIM and IVAO must have figured it out along with squawkbox box folks, but I haven't seen any docs.Thanks!Senior Captain, Pier Glass Aviation

Check out the FSInterrogate program that is bundled with FSUIPC. So far that's the only source of info I've found.The gauge SDK may have some info in it. I'm about to download it.Mike