if (
        !CreatePipe(
            &hReadPipe,  // дескриптор для читання
            &hWritePipe, // дескриптор для запису
            nullptr,     // атрибути захисту за замовчуванням, в цьому випадку
                         // дескриптори hReadPipe і hWritePipe не успадковуються
            0              // розмір буфера за замовчуванням
        )
        )
    {
        printf("Create pipe failed %d .\n", GetLastError());
        printf("Press any key to finish.\n");
        getchar();
        return GetLastError();
    }

if (WriteFile(wIn, buf, strlen(buf), &w, 0) == FALSE)

void CmdLaunch()
{
    HANDLE rIn, rOut, wIn, wOut;
    SECURITY_ATTRIBUTES sa = { 0 };
    STARTUPINFO si = { 0 };
    PROCESS_INFORMATION pi = { 0 };
    sa.nLength = sizeof(sa);
    sa.bInheritHandle = TRUE;
    sa.lpSecurityDescriptor = NULL;
    if (CreatePipe(&wIn, &rIn, &sa, 0) == 0)
    {
        printf("%d\n", GetLastError());
    }
    if (CreatePipe(&rOut, &wOut, &sa, 0) == 0)
    {
        printf("%d\n", GetLastError());
    }
    si.cb = sizeof(si);
    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
    si.wShowWindow = SW_HIDE;
    si.hStdInput = wIn;
    si.hStdOutput = wOut;
    si.hStdError = wOut;

    wchar_t cmdline[1024] = L"cmd.exe";
    //wchar_t app[1024] = L"C:\\windows\\system32\\cmd.exe";
    if (CreateProcessW(/*app*/NULL, cmdline, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi) == 0)
    {
        printf("CreateProcess err:%d\n", GetLastError());
        _getch();
    }
    else
    {
        DWORD r = 0;
        char *buf = new char[4096];
        memset(buf, 0, 4096);
        ReadFile(rOut, buf, 4096, &r, 0);
        std::cout << "R: " << buf;
        DWORD bwait = 0, runCode = 0;
        for (;;)
        {
            Sleep(50);
            GetExitCodeProcess(pi.hProcess, &runCode);
            if (runCode != STILL_ACTIVE)
            {
                printf("EXIT!!!");
                break; 
            }
            if (PeekNamedPipe(rOut, 0, 0, 0, &bwait, 0) == FALSE)
            {
                printf("PeekNamedPipe err: %d\n", GetLastError());
            }
            else
            {
                if (bwait > 0)
                {
                    //bwait = 0;
                    memset(buf, 0, 4096);
                    ReadFile(rOut, buf, 4096, &r, 0);
                    std::cout << std::endl << "R: " << buf;
                    memset(buf, 0, 4096);
                }
                else
                {
                    memset(buf, 0, 4096);
                    //std::cin >> buf;
                    //std::cin.getline(buf, 4096);
                    //scanf("%s", buf);
                    fgets(buf, 4096, stdin);
                    std::cout<< std::endl << "ent: " << buf << std::endl;
                    //strcat(buf, "\n");
                    DWORD w = 0;
                    //FlushFileBuffers(rIn);
                    if (WriteFile(rIn, buf, strlen(buf), &w, 0) == FALSE)
                    {
                        printf("wf err: %d\n", GetLastError());
                    }
                    memset(buf, 0, 4096);
                }
            }
        }
        CloseHandle(rIn);
        CloseHandle(wIn);
        CloseHandle(rOut);
        CloseHandle(wOut);
    }
}