c++ - 断言在 VS2008 但不是在 VS2005

Question

从VS2005切换到VS2008 SP1后，发现一个无法解释的问题。
一个程序在 VS2005 下在发布和 Debug模式下运行良好。在 VS2008 下，当进入调试器时会引发断言。
如果我让程序运行(在调试或 Release模式下)，则根本没有断言。

我在这上面花了将近两天的时间，但我不明白我做错了什么。

程序说明:我有一个基于 MFC 对话框的程序，它创建一个用户线程 (CWinThread)，该线程创建应用程序的主对话框。
工作线程无限循环并每秒向对话框发布一条消息。消息在 gui 线程中处理。

我的部分代码:

gui线程的InitInstance:

BOOL CGraphicalThread::InitInstance()
{
    CGUIThreadDlg* pDlg = new CGUIThreadDlg();
    pDlg->Create(CGUIThreadDlg::IDD);
    m_pMainWnd = pDlg;
    AfxGetApp()->m_pMainWnd = pDlg;
    return TRUE;
}

工作线程:

UINT ThreadProc(LPVOID pVoid)
{
    do
    {
        AfxGetApp()->m_pMainWnd->PostMessage(WM_APP+1, (WPARAM)new CString("Hello"), NULL);
        Sleep(1000);
    }
    while(!bStopThread);

    return 0;
}

对话消息处理程序是这样的:

LRESULT CGUIThreadDlg::OnMsg(WPARAM wp, LPARAM lp)
{
    CListBox* pList = (CListBox*)GetDlgItem(IDC_LIST1);
    CString* ps = (CString*)wp;
    pList->InsertString(-1, *ps);
    delete ps;
    return 1L;
}

这在 VS2005 上工作得很好。但是对于 VS2008，一旦设置断点并进入 Debug模式，我就会引发一个断言 ???
wincore.cpp 第 906 行

CObject* p=NULL;
if(pMap)
{
      ASSERT( (p = pMap->LookupPermanent(m_hWnd)) != NULL ||
              (p = pMap->LookupTemporary(m_hWnd)) != NULL);
}
ASSERT((CWnd*)p == this);   // must be us
// Note: if either of the above asserts fire and you are
// writing a multithreaded application, it is likely that
// you have passed a C++ object from one thread to another
// and have used that object in a way that was not intended.
// (only simple inline wrapper functions should be used)
//
// In general, CWnd objects should be passed by HWND from
// one thread to another.  The receiving thread can wrap
// the HWND with a CWnd object by using CWnd::FromHandle.
//
// It is dangerous to pass C++ objects from one thread to
// another, unless the objects are designed to be used in
// such a manner.

如果我删除 GUI 线程并将对话框创建到 CWinApp 线程中，问题就不会再出现。

有人知道吗？
我做错了什么吗？

谢谢

Answer 1

// Note: if either of the above asserts fire and you are
// writing a multithreaded application, it is likely that
// you have passed a C++ object from one thread to another
// and have used that object in a way that was not intended.
// (only simple inline wrapper functions should be used)
//
// In general, CWnd objects should be passed by HWND from
// one thread to another.  The receiving thread can wrap
// the HWND with a CWnd object by using CWnd::FromHandle.
//
// It is dangerous to pass C++ objects from one thread to
// another, unless the objects are designed to be used in
// such a manner.