Question: what is fsuipc for fs2004?
Answer: Version 3.74 for FS2004/FS98/FS2000/FS2002/CFS/CFS2 FSUIPC.dll application interfacing module . FSUIPC is effectively a successor to FS6IPC.dll. Both modules are designed to allow external (i.e. separate) programs to communicate with and perhaps control Microsoft Flight Simulator.