>What I would do is define my constants and place them into my oSys object, which as it is passed around makes the DEFINE values & names available for every routine.

Would that work? The contants get handled at compile time and need to be available then.

I create a top level .h file with the app name like MyApp.h. Then set this as the default include file. Now I never have to worry about adding it to classes and such.

I then just #include any other .h files I need in MyApp.h and any app specific #defines go in there as well. That way they are always available. Worked so far, but I'm open to other ideas.