线程中SetDlgItemText阻塞

在外部用了waitforsignalobject后, 线程中SetDlgItemText就没有返回,无法执行到后面z那边的语句,是为啥?消息没发出去?

void ThreadFunc(int x)
{
    CString strCnt;
    int i, z;
    for (i = x; i > 0; --i)
    {
        strCnt.Format(_T("%d"), i);
        ::SetDlgItemText(AfxGetApp()->m_pMainWnd->m_hWnd, IDC_COUNT, strCnt);
        z = i;
        ++z;
    }
}


void CMultiThread2Dlg::OnBnClickedStart()
{
    // TODO: Add your control notification handler code here
    UpdateData(TRUE);
    int x = m_nCount;
    hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadFunc, (VOID*)x, 0, &ThreadID);
    GetDlgItem(IDC_START)->EnableWindow(FALSE);
    WaitForSingleObject(hThread, INFINITE);
    GetDlgItem(IDC_START)->EnableWindow(TRUE);
}

MFC中，在子线程中调用Dlg相关方法貌似会出问题，你在子线程中改用PostMessage试试？然后在消息处理的方法中再SetDlgItemText。