// Required include files:
#include <fstream>
#include <iostream>
#include <string>
#include <windows.h>
#include <wchar.h>
using namespace std;

// Note: This function must link with library comdlg32.lib:
//   Project-->Properties-->ConfigurationProperties-->Linker-->Input
//   and then click to the right of Additional Dependencies
//   click the ... button that appears
//   type the name comdlg32.lib in the text box
//   and click Apply.
// Note: This function requires ordinary characters rather than
//   Unicode, like this:
//   Project-->Properties->ConfigurationProperties-->General
//   and then change the Character Set to 
//   Use Multi-Byte Character Set.
// --Michael Main (April 17, 2007)

// Function to open a file dialog box and return the name of the
// file that the user selects.  It works for .txt files only.
#define _UNICODE
string file_name_from_dialog( )
{
    string EMPTY = "";
    OPENFILENAME ofn;       // Struct for opening a file
    char fn[MAX_PATH+1];    // Space for storing the open file name
    System::String^ path;   // Path of current working directory

    path = System::IO::Directory::GetCurrentDirectory();
    ZeroMemory(&ofn, sizeof(OPENFILENAME));
    ZeroMemory(&fn, MAX_PATH+1);
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.lpstrFilter = "Text files (*.txt)\0*.TXT\0\0";
    ofn.lpstrFile = fn;
    ofn.nMaxFile = MAX_PATH+1;
    ofn.Flags = OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST ;
    if (!GetOpenFileName(&ofn)) 
	return EMPTY;
    System::IO::Directory::SetCurrentDirectory(path);
    return fn;
}

int main()
{
	cout << file_name_from_dialog( ) << endl;
	return 0;
}