Listing the Files in a Directory in Visual C++ - visual-c++

Question

I have tried to "simplify" a nice piece of example code, the hyperlink to the code is at the end of this message, to specify the directory string instead of passing it as a command line argument. The simplified code compiles and executes, but the filename and size are not what I expect: the file name appears to be a hex number, and the nFileSize.High is larger than the nFileSize.Low (the actual file sizes range from 0 to 100Mb). I think my type casting may have introduced errors. Any suggestions?
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <cctype>
#include <bitset>
#include <sstream>
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#include <strsafe.h>
#pragma comment(lib, "User32.lib")
using namespace std;
using namespace System; //set common language runtime support to /clr
int main()
{
WIN32_FIND_DATA ffd;
LARGE_INTEGER filesize;
//TCHAR szDir[MAX_PATH];
//size_t length_of_arg;
HANDLE hFind = INVALID_HANDLE_VALUE;
//DWORD dwError=0;
finstr = "C:\\Users\\MyName\\Documents\\Visual Studio 2010\\Projects\\Data Analysis\\Data Folder\\*";
//Just evaluate the first file before looping over all files
hFind = FindFirstFile((wchar_t*)(finstr.c_str()), &ffd);
wstring wsfname(ffd.cFileName);
string newtemp(wsfname.begin(), wsfname.end());
cout << "1st fname = " << ffd.cFileName << " newtemp = "<< newtemp << " nFSizeLo = "<< ffd.nFileSizeLow << " nFSizeHi = "<< ffd.nFileSizeHigh << "\n";
FindClose(hFind);
return 0;
}
Link to original example from Microsoft
https://msdn.microsoft.com/en-us/library/windows/desktop/aa365200(d=printer,v=vs.85).aspx