# define XBT_EXPORT_NO_IMPORT(type) __declspec(dllexport) type
# define XBT_IMPORT_NO_EXPORT(type) type
# define XBT_PUBLIC_DATA(type) extern __declspec(dllexport) type
# define XBT_EXPORT_NO_IMPORT(type) __declspec(dllexport) type
# define XBT_IMPORT_NO_EXPORT(type) type
# define XBT_PUBLIC_DATA(type) extern __declspec(dllexport) type