Według MSDN przekierowuje stdout dziecka do macierzystego stdout, ale tak nie jest, co jest nie tak?

   PROCESS_INFORMATION pi;
   STARTUPINFOA si;

   ZeroMemory( &si, sizeof(si) );
   si.cb = sizeof(si);
   ZeroMemory( &pi, sizeof(pi) );
   si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
   si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
   si.dwFlags |= STARTF_USESTDHANDLES;

   BOOL ret = CreateProcessA( 0, cmd_line, 0, 0, TRUE, CREATE_NO_WINDOW, 0, 0, & si, & pi);

użycie DuplicateHandle nie pomaga:

HANDLE out, err;//global variables
...
PROCESS_INFORMATION pi;
STARTUPINFOA si;

ZeroMemory( &si, sizeof(si) );
si.cb = sizeof(si);
ZeroMemory( &pi, sizeof(pi) );  
BOOL ret = DuplicateHandle( GetCurrentProcess(), GetStdHandle(STD_OUTPUT_HANDLE),  GetCurrentProcess(), &out, 0, TRUE, DUPLICATE_SAME_ACCESS);//todo check ret
ret = DuplicateHandle( GetCurrentProcess(), GetStdHandle(STD_ERROR_HANDLE),  GetCurrentProcess(), &err, 0, TRUE, DUPLICATE_SAME_ACCESS);//todo check ret

si.hStdOutput = out;
si.hStdError = err;
si.dwFlags |= STARTF_USESTDHANDLES;

ret = CreateProcessA( 0, cmd_line, 0, 0, TRUE, CREATE_NO_WINDOW, 0, 0, & si, & pi);