Перенаправление стандартных потоков ввода/вывода для внешней программы

#include <windows.h>
#include <stdio.h>
#include <string.h>
 
#define STD_IN      0
#define STD_OUT     1
 
#define PIPESIZE    4096
 
HANDLE hPipeIn, hPipeOut;
HANDLE sInHandle, sOutHandle;
HANDLE nInHandle, nOutHandle;
 
char buf [PIPESIZE];
 
void check (char *progName, char *input, char *output)
{
    DuplicateHandle(nInHandle, &sInHandle, NULL, NULL, NULL, NULL, NULL);
    DuplicateHandle(nOutHandle, &sOutHandle, NULL, NULL, NULL, NULL, NULL);
    CreatePipe(&hPipeIn, &hPipeOut, NULL, PIPESIZE);
    DuplicateHandle(hPipeIn, nInHandle, NULL, NULL, NULL, NULL, NULL);
    DuplicateHandle(hPipeOut, nOutHandle, NULL, NULL, NULL, NULL, NULL);
    nInHandle=hPipeIn;
    nOutHandle=hPipeOut;
    strcpy(buf, "dir\nexit\n");
    unsigned long btWrited;
    WriteConsole(hPipeOut, buf, strlen(buf), &btWrited, NULL);
    WriteConsole(sOutHandle, input, strlen(input), &btWrited, NULL);
    printf("Eta stroka ne vivoditsya na zapuskayemuyu programmu!!!\n");
    system(progName);
    return;
}
 
int main (void)
{
    check("cmd.exe", "cmd\n", NULL);
    return 0;
}