>>In one of my application, I have a main EXE which is calling other sub EXEs. Some main functions are part of the main EXE but we use them in the sub EXEs. When we compile those EXEs, we have unknown references, which is normal because the project manager can't see those functions because they are in the main EXE.
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>>What would be an easy way to avoid that?
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>check help on EXTERNAL... works for external procedures, classes, forms etc. as well as arrays

Yes, but I think I already tried that for those functions and I still get the same result. I don't think it is applicable to functions.