error C3395: 'MyClass::Function' : __declspec(dllexport) cannot be applied to a

error C3395: 'MyClass::Function' : __declspec(dllexport) cannot be applied to a function with the __clrcall calling convention

解决方法是，为参数包上 gcroot<>.

class AFX_EXT_CLASS MyClass{ public: 　　void Function(MyDotNetClass^ obj); // 编译错误　　void Function(gcroot<MyDotNetClass^> obj); // OK!}