Pipes not working

    HANDLE g_hChildStd_IN_Rd;
    HANDLE g_hChildStd_IN_Wr;
    HANDLE g_hChildStd_OUT_Rd;
    HANDLE g_hChildStd_OUT_Wr;
    HANDLE hNamedPipe=0;
 
    SECURITY_ATTRIBUTES saAttr;
 
    saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
    saAttr.bInheritHandle = TRUE;
    saAttr.lpSecurityDescriptor = NULL;
 
 
    if (!CreatePipe(&g_hChildStd_OUT_Rd, &g_hChildStd_OUT_Wr, &saAttr, 0))
        ExitProcess(-1);
 
 
    if (!CreatePipe(&g_hChildStd_IN_Rd, &g_hChildStd_IN_Wr, &saAttr, 0))
        ExitProcess(-2);
 
    
    HANDLE hHeap = HeapCreate(0, 0x10000, 0);
    LPSTR szCmdline = HeapAlloc(hHeap, HEAP_ZERO_MEMORY, 256);
    lstrcpy(szCmdline, "C:\\Windows\\System32\\cmd.exe");
    
 
    PROCESS_INFORMATION piProcInfo = { 0 };
    STARTUPINFO siStartInfo = { 0 };
 
    siStartInfo.cb = sizeof(STARTUPINFO);
    siStartInfo.hStdError = g_hChildStd_OUT_Wr;
    siStartInfo.hStdOutput = g_hChildStd_OUT_Wr;
    siStartInfo.hStdInput = g_hChildStd_IN_Rd;
    siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
    SECURITY_ATTRIBUTES sa;
 
    if (!CreateProcess(NULL, szCmdline, &sa, NULL, TRUE, 0, NULL, NULL, &siStartInfo, &piProcInfo)) {
        MessageBox(0, szCmdline, szCmdline, 0);
        ExitProcess(-3);
    }
    else
    {
 
        CloseHandle(piProcInfo.hProcess);
        CloseHandle(piProcInfo.hThread);
    }
    hNamedPipe = CreateFileA(szCmdline, GENERIC_READ,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_READONLY,
        NULL);
 
    if (hNamedPipe == INVALID_HANDLE_VALUE) {
        MessageBox(0, szCmdline, szCmdline, 0);
        HeapDestroy(hHeap);
        ExitProcess(-4);
    }
    char   szBuf[BUFSIZE];
 
    DWORD  cbRead; DWORD  cbWritten;
 
    HANDLE hParentStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
 
    ReadFile(hNamedPipe, szBuf, sizeof(szBuf), &cbRead, NULL);
    if (cbRead > 0)return -5;
    while (TRUE)
    {
        MessageBox(0, szBuf, szBuf, 0);
        WriteFile(hParentStdOut, szBuf, strlen(szBuf) + 1, &cbWritten, NULL);
        ReadFile(hNamedPipe, szBuf, strlen(szBuf), &cbRead, NULL);
    }
    HeapDestroy(hHeap);
    return 0;

    hNamedPipe = CreateFileA(szCmdline, GENERIC_READ,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_READONLY,
        NULL);
 
    if (hNamedPipe == INVALID_HANDLE_VALUE) {
        MessageBox(0, szCmdline, szCmdline, 0);
        HeapDestroy(hHeap);
>>>>ExitProcess(-4);<<<<
    }
    char   szBuf[BUFSIZE];
 
    DWORD  cbRead; DWORD  cbWritten;
 
    HANDLE hParentStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

hNamedPipe = CreateFileA("\\\\.\\C:\\Windows\\System32\\cmd.exe", GENERIC_READ,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_READONLY,
        NULL);

SECURITY_ATTRIBUTES sa2;
    hNamedPipe = CreateFileA("\\\\.\\C:\\Windows\\System32\\cmd.exe", GENERIC_READ,
        0,
        &sa2,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_READONLY,
        NULL);

hNamedPipe = CreateFileA("\\.\pipe\C:\Windows\System32\cmd.exe", 
hNamedPipe = CreateFileA("\\\\.\\pipe\\C:\\Windows\\System32\\cmd.exe",

if (!ReadFile(hNamedPipe, szBuf, sizeof(szBuf), &cbRead, NULL))
    return -5;
 
if (cbRead == 0)
     return -6;

    SECURITY_ATTRIBUTES sa2;
    hNamedPipe = CreateFileA("\\\\.\\pipe\\C:\\Windows\\System32\\cmd.exe", 
        GENERIC_READ,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_READONLY,
        NULL);
    if (hNamedPipe == INVALID_HANDLE_VALUE) {
        MessageBox(0, szCmdline, szCmdline, 0);
        
        HeapDestroy(hHeap);
        return -4;
    }

 if (hNamedPipe == INVALID_HANDLE_VALUE) {
        MessageBox(0, szCmdline, szCmdline, 0);
        
        HeapDestroy(hHeap);
        return -4;
    }