我觉得是要把那个类的定义写出来的class _declspec(dllimport) Point{};一般在头文件中这样,然后再包含这个头文件:#ifdef DLL3_EXPORTS#define DLL3_API __declspec(dllexport)#else#define DLL3_API __declspec(dllimport)#endif// This class is exported from the dll3.dllclass DLL3_API Cdll3 {public: Cdll3(void); // TODO: add your methods here.}