Hello, I am trying to use the boost serialization library to serialize the classes from my application (I use Microsoft Visual C++ 7.1 compiler). The most of the classes are placed in a DLL, some are in my executable project. For this, I had to link (statically) the DLL and the executable with boost serialization library. I used the BOOST_CLASS_EXPORT macro for all the derived classes that I serialize through a base class pointer: in each header, after the class declaration, I added the BOOST_CLASS_EXPORT(class_name) line. The DLL and executable compilation time increased drastically, and both the DLL and the executable export tables contain all the entities (classes & functions) resulted from the BOOST_CLASS_EXPORT macro expansion (and because the BOOST_DLLEXPORT is defined as __declspec(dllexport) in force_include.hpp). This happens because I have to include the header files from the DLL source files, also from the executable project source files. My question is: where should I put the BOOST_CLASS_EXPORT declarations for the DLL classes? Note that I invoke the serialization/deserialization only from the executable (not from the DLL). I tried to group all the BOOST_CLASS_EXPORT declarations in a cpp file in the executable project. It went pretty good, but after inserting many declarations, I received the C1204 error (internal structure overflow). Are there "things to know" for using the serialization library from a DLL? Also, there are no test projects that cover this aspect. Thanks a lot, Florian Preknya