DWORD dwBytesReturned = 0;      BYTE bytBuffer_1[512];      BYTE bytBuffer_2[512];      CHAR string[2048];      HANDLE hDevice, hDriver;      BOOL bRet;        hDevice = CreateFile("\\\\.\\PhysicalDrive0", GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);        if(hDevice == INVALID_HANDLE_VALUE)      {          printf("\nFailed - CreateFile - Open the PhysicalDrive0.\n");          return 0;      }        bRet = ReadFile(hDevice, (LPVOID)bytBuffer_1, 512, &dwBytesReturned, NULL);      if(bRet == FALSE)      {          printf("\nFailed - ReadFile - the first one.\n");          return 0;      }      printf("aaaa");      Sleep(1000*3);      printf("\nRead MBR using the ReadFile function...\n");      printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");        sprintf(string, "\n");        for(DWORD i = 0; i < 512; i++)      {          sprintf(string, "%s X", string, bytBuffer_1[i]);            if(((i + 1) % 16) == 0)              sprintf(string, "%s\n", string);            if(((i + 1) % 16) == 8)              sprintf(string, "%s -", string);      }        printf("%s", string);        printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");