I need two processes communicating with an IPC. These processes are not in a parent/child relationship and will startup and shutdown independently. So both processes will need to rendezvous by using the same IPC key when creating or opening an IPC object such as a message queue or shared memory. How do I ensure the IPC key is unique and will not conflict with an existing or future application? Also, in creating a named pipe I need a pathname of the FIFO file to create. I have been told that modifying a driver bundle is not possible, so I guess the pipe cannot reside in the driver's kext. Is there a standard location in the directory tree where FIFOs should reside? Or should they be placed in the same path as the application? Note I believe the path will need to be hardcoded in the driver kext at build time, since I don't think it can be modified to reflect the installation path of the software at install time. Thanks, Sean