Even when you understand and commit to the laws of COM identity, you'll find that they aren't very restrictive. Prefer multiple inheritance, but do not feel that ATL limits you to that technique. You can extend the interface map to support any identity trick that ATL doesn't support directly.

ATL Internals. Working with ATL 8
ATL Internals: Working with ATL 8 (2nd Edition)
ISBN: 0321159624
EAN: 2147483647
Year: 2004
Pages: 172

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