Exporting classes containing `std::` objects (vector, map etc.) from a DLL

I'm trying to export classes from a DLL that contain objects such as std::vectors and std::strings - the whole class is declared as DLL export through: class DLL_EXPORT FontManager { The problem is that for members of the complex types I get this warning: warning C4251: 'FontManager::m__fonts' : class 'std::map<_Kty,_Ty>' needs to have dll-interface to be used by clients of class 'FontManager' wit

[Kazumi007]

STLのメンバーを持つクラスのDLL export。STLをDLL Exportすると、VCのバージョンに依存するので、DLLのメリットが減っている気がする。