双管道测试问题
我在学双管道的时候，出了点问题，在PreTranslateMessage(MSG* pMsg)函数中调用_beginthreadex(NULL, 0, TelnetThread, NULL, 0, NULL);但是，半天也没显示出来,下面是TelnetThread函数，麻烦大家帮忙看下

C/C++ code

unsigned _stdcall TelnetThread(void *pParam){    SECURITY_ATTRIBUTES sa;    HANDLE hRead, hWrite;    sa.nLength = sizeof(SECURITY_ATTRIBUTES);    sa.lpSecurityDescriptor = NULL;    sa.bInheritHandle = TRUE;    CString strcmd;    g_dlg->m_cmdshell.GetWindowText(strcmd);    // 获取命令    strcmd = _T("cmd /k ") + strcmd;    if (strcmd.IsEmpty())    {        return 1;    }    // 创建命名管道    if (!CreatePipe(&hRead, &hWrite, &sa, NULL))    {// 创建管道失败        return 0;    }        STARTUPINFO si;    PROCESS_INFORMATION pi;    si.cb = sizeof(STARTUPINFO);    GetStartupInfo(&si);    si.hStdInput = hRead;    si.hStdError = hWrite;        si.hStdOutput = hWrite;//    si.wShowWindow = SW_SHOW;    si.wShowWindow = SW_HIDE;    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;    wchar_t cmdline[256] = {0};    // 得到系统路径    GetSystemDirectory(cmdline, sizeof(cmdline));    wcscat_s(cmdline, _T("\\cmd.exe"));    // 创建cmd进程//    if (CreateProcess(cmdline, NULL, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi) == 0)//    {//        printf("CreateProcess Error\n");//    }    if (!CreateProcess(cmdline, strcmd.GetBuffer(strcmd.GetLength()), NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi))    {// 创建线程失败        MessageBox(g_dlg->m_hWnd, _T("建立线程失败"), _T("提示"), MB_OK);        return 0;    }    if (WaitForSingleObject(pi.hProcess, INFINITE) == WAIT_FAILED)    {        CloseHandle(pi.hProcess);        CloseHandle(pi.hThread);        return 0;    }    CloseHandle(hWrite);        char buffer[1024 * 4] = {0};//    wchar_t buffer[1024 * 4] = {0};    DWORD byteRead;    CString strResult = _T("");        while (true)    {        memset(buffer, 0, 1024 * 4);        // 从命令管道中读取数据        if (ReadFile(hRead, buffer, 4095, &byteRead, NULL) != NULL)        {             g_dlg->m_show.GetWindowText(strResult);            strResult += buffer;            // 显示到界面上            g_dlg->m_show.SetWindowText(strResult);                g_dlg->m_cmdshell.SetWindowText(_T(""));            break;        }        else        {            break;        }    }        CloseHandle(hRead);    return 0;}