VS2010 x64:64位平台VS2010中包含错误数据的对象数组

我正在VS2010中将32位代码移植到64位代码。我的应用程序在尝试打开其中一个对话框时崩溃了，但我发现它在32位配置中运行得很好，但在64位配置中却不行。我发现有一个包含字符数组的对象数组，64位平台中的数据不正确。假设有一个字符串列表：红色，黑色，。。。。在32位中，列表显示正确，但在64位中，第二个对象的字符指针指向黑色的k，即实际数据前4个字节。对象大小在32位平台中为144字节，但在64位平台中，每个对象的大小为148字节。

BOOL SomeDlg::OnInitDialog( HWND hwnd, HWND hwndFocus, LPARAM lParam )
{
   MEMBERASSERT();
   CABCDialog::OnInitDialog( hwnd, hwndFocus, lParam );
   int nHeight = ListBox_GetItemHeight( GetDlgItem(hwnd, IDC_DUMMYLIST),    -1 );
   m_myLst.SetItemHeight(-1, nHeight);
   m_ClrLst.SetItemHeight(-1, nHeight);
   char smyItem[64];
   for (UINT i=0; i < 10; i++)
   {
      LoadString(g_hInstance, IDS_COLORNAMES+i, smyItem, ELEMENTS_IN(smyItem));
      m_ZAItems[i].SetColor(m_pSettings->m_rgbColors[i]);
      m_ZAItems[i].SetText(smyItem);
    //debug issue, check size of object
      int a = sizeof(m_ZAItems[i]);
      m_myLst.AddItem( &m_ZAItems[i] );
    }
//some other stuff
}
  class SomeDlg : public CABCDialog
   {
   private:
      MyDrwaLstBox m_myLst;
      My_ColorComboBox    m_ClrLst;
      My_ColorText  m_ZAItems[11];

   private:    
   SomeDlg();
   SomeDlg(const SomeDlg &);
   const SomeDlg &operator=(const SomeDlg &);

  public:   
     SomeDlg(HWND hwndZW, MCURRENT* pSettings , LPCSTR szName );
     virtual void Notification( ADM_Wnd *pWnd, UINT uID, int nNotificationCode, LPARAM lData );
    virtual BOOL OnInitDialog( HWND hwnd, HWND hwndFocus, LPARAM lParam );
  };
class MyDrwaLstBox : public MY_ListBox
{
protected:
   BOOL                          m_bpmn;
private:
                             MyDrwaLstBox( const  MyDrwaLstBox& );
   const MyDrwaLstBox &  operator=( const MyDrwaLstBox & );
public:
                             MyDrwaLstBox ();
   virtual void                  OnDrawItem( HWND hwnd,
                                         const DRAWITEMSTRUCT * lpDrawItem );
};

class My_ColorText : public My_Color
{
private:                                 
   enum { txtLen = 128 };    
   TCHAR m_szText[ txtLen ]; 
   My_ColorText ( const My_ColorText  & );
   const My_ColorText  &operator=( const My_ColorText  & );

public:
   My_ColorText ();
   My_ColorText ( COLORREF rgbColor, LPCTSTR pszText );
   void SetText( LPCTSTR pszText );
   void SetText( HINSTANCE hInstance, UINT uID );
   LPCTSTR GetText();
   virtual void Draw( HDC hDC, RECT rRect, BOOL bChecked, BOOL bDisabled,
                  BOOL bFocus, BOOL bGrayed, BOOL bSelected );
};
My_ColorText::My_ColorText()
{   
   m_szText[0] = '';
}
My_ColorText::My_ColorText( COLORREF rgbColor, LPCTSTR pszText )
 : My_Color( rgbColor )
{
   MDC_strncpyz( m_szText, pszText );
}
void My_ColorTex::SetText( LPCTSTR pszText )
{
  MDC_strncpyz( m_szText, pszText );
}
void My_ColorText::SetText( HINSTANCE hInstance, UINT uID )
{
  *m_szText = '';
  LoadString( hInstance, uID, m_szText, ELEMENTS_IN( m_szText ) );
}
LPCTSTR My_ColorText::GetText()
{
  return m_szText;
}
template <size_t size>
LPSTR MDC_strncpyz(CHAR (&dest)[size], LPCSTR srce) { return MDC_strncpyz(dest, srce, size); }

class My_Color : public My_DrawItem
{
private:
   COLORREF                   m_rgbColor;
private:
                          My_Color( const My_Color & );
  const My_Color &    operator=( const My_Color & );
public:
                          My_Color( void );
                          My_Color( COLORREF rgbColor );
  virtual void               Draw( HDC hDC, 
                                RECT rRect,
                                BOOL bChecked,
                                BOOL bDisabled,
                                BOOL bFocus,
                                BOOL bGrayed,
                                BOOL bSelected );
};
My_Color::My_Color void )
 : m_rgbColor( RGB_BLACK )
{
}
My_Color::My_Color( COLORREF rgbColor )
 : m_rgbColor( rgbColor )
{
}
 class My_DrawItem
{
protected:                             
   BOOL                       m_bInListBox;                              
   DWORD                      m_dwUser;
private:
                          My_DrawItem( const My_DrawItem & );
const My_DrawItem &  operator=( const My_DrawItem & );
public:
                          My_DrawItem();
virtual                    ~My_DrawItem();
virtual void               Draw( HDC hDC, 
                                RECT rRect,
                                BOOL bChecked,
                                BOOL bDisabled,
                                BOOL bFocus,
                                BOOL bGrayed,
                                BOOL bSelected );
};
My_DrawItem::My_DrawItem()
 : m_bInListBox( FALSE ),
m_dwUser( 0 )
{
}

"SomeDlg"类包含My_ColorComboBox类的对象，而My_ColorText类又包含对象的数组。当通过My_ColorComboBox类调用My_ColorText类的构造函数时，m_ColorItems[0]的m_szText和m_ColorItems[1]的m_szText的基址之差等于152字节。意味着My_ColorText（）构造函数为m_szText变量分配152字节差的基地址。但是当通过SomeDlg类调用My_ColorText类的构造函数时，则m_ZAItems[0]的m_szText和m_ZAItems[1]的m_szText的基址之差等于148字节。因此，字符串并没有被插入到152字节差的适当位置。

当我检查sizeof（My_ColorText）时，在这两种情况下，它都会给我152个字节。