CopyMemory with CObject

Question

我正在尝试使用共享内存在两个进程之间进行通信，我想传输一个CObject对象。

我有

class CMyObject : public CObject  
{
public:
CMyObject();
virtual ~CMyObject();

public:
int m_nId;
CString m_sData;
};

和这个对象，我打算通过IPC发送：

if(NULL == m_pMyObject)
{
    m_pMyObject = new CMyObject;
    m_pMyObject->m_nId = 24;
    m_pMyObject->m_sData = sBuffer;
}

和

HANDLE hMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 0, lpszMappingName);
LPVOID lpData = MapViewOfFile(hMapping, FILE_MAP_WRITE, 0, 0, sizeof(CMyObject));
if(NULL != lpData)
    CopyMemory(lpData, m_pMyObject, sizeof(CMyObject));

似乎有效。

但是当我尝试在第二个过程中读取CMyObject数据时：

HANDLE hMapping = OpenFileMapping(FILE_MAP_READ, 0, pszMappingName);
CMyObject* lpData = (CMyObject*)MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0, sizeof(CMyObject));
if(NULL != lpData)
    TRACE(_T("%s"), lpData->m_sData);

有时候会崩溃，什么都没有得到......你能给我一点帮助吗？ 谢谢。