在制造OCX时，为什么定义了属性却无法访问

在制作OCX时，为什么定义了属性却无法访问
[code=C/C++][/code]已定义了一个属性FetionUser,但即出现“[C++ Error] FetionOCImpl1.cpp(654): E2316 'FetionUser' is not a member of 'TWinControlAccess<TFetionOCX>'”错误，如何解决？

C/C++ code

STDMETHODIMP TFetionOCXImpl::get_FetionUser(BSTR* Value)
{
  try
  {
    *Value = WideString(m_VclCtl->FetionUser).Copy(); //这里出错
  }
  catch(Exception &e)
  {
    return Error(e.Message.c_str(), IID_IFetionOCX);
  }
  return S_OK;
};

以下是通过界面定义自动生成的代码：
头文件
[code=C/C++]
//$$---- Active Form HDR ---- (stActiveFormHdr)
//---------------------------------------


#ifndef FetionOCImpl1H
#define FetionOCImpl1H
//---------------------------------------
#include <classes.hpp>
#include <controls.hpp>
#include <stdCtrls.hpp>
#include <forms.hpp>
#include "FetionOCProj1_TLB.h"
#include <AxCtrls.hpp>
//---------------------------------------
class TFetionOCX : public TActiveForm
{
__published: // IDE-managed Components
private: // User declarations
public: // User declarations
  __fastcall TFetionOCX(HWND ParentWindow);
  __fastcall TFetionOCX(TComponent* AOwner): TActiveForm(AOwner) {};
};
//---------------------------------------
extern PACKAGE TFetionOCX *FetionOCX;
//---------------------------------------



//---------------------------------------
class ATL_NO_VTABLE TFetionOCXImpl:
  VCLCONTROL_IMPL(TFetionOCXImpl, FetionOCX, TFetionOCX, IFetionOCX, DIID_IFetionOCXEvents)
{
  void __fastcall ActivateEvent(TObject *Sender);
  void __fastcall ClickEvent(TObject *Sender);
  void __fastcall CreateEvent(TObject *Sender);
  void __fastcall DblClickEvent(TObject *Sender);
  void __fastcall DeactivateEvent(TObject *Sender);
  void __fastcall DestroyEvent(TObject *Sender);
  void __fastcall KeyPressEvent(TObject *Sender, char &Key);
  void __fastcall PaintEvent(TObject *Sender);
public:

  void InitializeControl()
  {
  m_VclCtl->OnActivate = ActivateEvent;
  m_VclCtl->OnClick = ClickEvent;
  m_VclCtl->OnCreate = CreateEvent;
  m_VclCtl->OnDblClick = DblClickEvent;
  m_VclCtl->OnDeactivate = DeactivateEvent;
  m_VclCtl->OnDestroy = DestroyEvent;
  m_VclCtl->OnKeyPress = KeyPressEvent;
  m_VclCtl->OnPaint = PaintEvent;
  }

// The COM MAP entries declares the interfaces your object exposes (through
// QueryInterface). CComRootObjectEx::InternalQueryInterface only returns
// pointers for interfaces in the COM map. VCL controls exposed as OCXes
// have a minimum set of interfaces defined by the
// VCL_CONTROL_COM_INTERFACE_ENTRIES macro. Add other interfaces supported
// by your object with additional COM_INTERFACE_ENTRY[_xxx] macros.
//
BEGIN_COM_MAP(TFetionOCXImpl)
  VCL_CONTROL_COM_INTERFACE_ENTRIES(IFetionOCX)
END_COM_MAP()



// The PROPERTY map stores property descriptions, property DISPIDs,
// property page CLSIDs and IDispatch IIDs. You may use use
// IPerPropertyBrowsingImpl, IPersistPropertyBagImpl, IPersistStreamInitImpl,
// and ISpecifyPropertyPageImpl to utilize the information in you property
// map.
//
// NOTE: The BCB Wizard does *NOT* maintain your PROPERTY_MAP table. You must
// add or remove entries manually.
//
BEGIN_PROPERTY_MAP(TFetionOCXImpl)