[C++] Wyświetlanie wybranych plików w oknie dialogowym

int id = 0;
string dir[ 99 ];

struct _finddata_t c_file;
intptr_t hFile;
// Find first .c file in current directory
if(( hFile = _findfirst( "*.*", & c_file ) ) == - 1L )
     printf( "No *.c files in current directory!\n" );
else
{
    while( _findnext( hFile, & c_file ) == 0 )
    {
        char buffer[ 30 ];
        ++id;
        dir[ id ] = c_file.name;
        cout << id << endl;
    }
    _findclose( hFile );
}

#include <iostream>
#include <iterator>
#include <algorithm>
#include <boost/filesystem.hpp>
namespace fs = boost::filesystem;
//albo zamiast boost
//#include <experimental/filesystem>
//namespace fs = std::experimental::filesystem;


int main()
{
    auto is_image =[]( const auto & entry )
    {
        const char * const images[] = { ".jpg", ".jpeg", ".bmp", ".png" };
        return std::find( std::begin( images ), std::end( images ), entry.path().extension() ) != std::end( images );
    };
   
    for( const auto & entry: fs::directory_iterator( "c:/images" ) )
    {
        if( !is_directory( entry ) && is_image( entry ) )
             std::cout << entry << std::endl;
       
    }
}

int id = 0; // numer pliku
string dir[ 99 ]; // lista plików
string ab = "", plik = "";
// --- funkcja odczytująca pliki ---
struct _finddata_t c_file;
intptr_t hFile;
hFile = _findfirst( "*.*", & c_file );
while( _findnext( hFile, & c_file ) == 0 )
{
    plik = c_file.name;
    if( plik.size() > 4 ) ab = plik.substr( plik.size() - 3, 3 );
   
    if( ab == "jpg" || ab == "JPG" || ab == "png" || ab == "PNG" || ab == "pcx" || ab == "PCX" || ab == "bmp" || ab == "BMP" )
         ++id, dir[ id ] = plik;
   
}
_findclose( hFile );