To do something like this, you'll have to invest some effort to understand the serialization library at more depth that is required for someone who just want's to use it. I can't offer any "cookbook" like approach. But I can help maybe a tiny bit. Note that the polymorphic versions of the archives classes are the result of application of a "polymorphic archive adaptor" to any other archive. This "polymorphic archive adaptor" is little more than a glorified typedef which uses the base archive type as a parameter. So, you want to do this in two stages: a) make your own archive - from scratch or by derivation from an existing one - be sure to test it. b) apply the "polymorphic archive adaptor" to make a polymorphic version. If you want to practice, you should be able to take the demo_fast_archive example - which makes a derivation from binary_?archive, apply the "polymorphic archive adaptor" and generate a polymorphic_fast_binary_archive (or what ever). This should take about an hour to do. Good Luck Robert Ramey Robert S. Grimes wrote:
Hi,
How do I get started? I want to create a set of custom archives that include such features as a small header, CRC, digital signatures, etc. I want to put this into a DLL, so I want to go the polymorphic route. There are directions for creating new archives from the template versions, but not for the polymorphic versions. I'm not sure the starting point is the same, so I thought I'd ask first, as this is stretching my abilities a bit.
Thanks, -Bob