How to implement an IPv6 ping command in VC++

Today I write a sample code for my customer for demonstrating how to implement a IPv6 ping command. I would like to share it here with you.

/*The code is post here for your reference and welcome your criticism. Wacle-2007-May-24*/

   #include "StdAfx.h"
#include "GRunner.h"
#include "ipexport.h"
#include "Icmpapi.h"
#include "Iphlpapi.h"
#include "Winsock2.h"
#include "ws2tcpip.h"
#include <conio.h>
#include <ctype.h>


void testIPv6Ping()
...{
    HANDLE hIcmp6File = NULL;
    struct sockaddr_in6* source=NULL;
    struct addrinfo* dest=NULL;
    char* requestData = NULL;
    char* replyData = NULL;
    char* strHost = NULL;

    int nret = 0;
    const int REQUEST_DATA_SIZE = 6;
    IP_OPTION_INFORMATION ipInfo=...{255, 0, 0, 0, NULL};
    source = new sockaddr_in6;
    
    strHost = new char[128];
    requestData = new char[EQUEST_DATA_SIZE];
    strcpy(requestData,"HELLO");
    int reply_data_size = sizeof(ICMPV6_ECHO_REPLY)+REQUEST_DATA_SIZE;
    replyData = new char[reply_data_size];
    int try_timeout = 1000;
    char end;

    WORD wVersionRequested;
    WSADATA wsaData;
    int err;     
    wVersionRequested = MAKEWORD( 2, 2 );     
    err = WSAStartup( wVersionRequested, &wsaData );

    
    if((hIcmp6File = Icmp6CreateFile())==INVALID_HANDLE_VALUE)
    ...{
        printf(" Unable to open handle! ");
        printf("Icmp6CreateFile returned error: %ld ",GetLastError());
    }
    else
    ...{
        source->sin6_family = AF_INET6;
        source->sin6_addr = in6addr_any;
        source->sin6_flowinfo = 0;
        source->sin6_port=0;

        printf("input the destination address: ");
        scanf("%s",strHost);
        if((nret = getaddrinfo(strHost,NULL,NULL,&dest))!=0)
        ...{
            printf("Invalid dest! Type any character to exit!");
            _getche();            
        }
        else
        ...{
            do...{
                DWORD numreplies = Icmp6SendEcho2( hIcmp6File, 0, 0, 0,
                                                     source, (sockaddr_in6*)dest,
                                                     requestData, 5, &ipInfo,
                                                     replyData, reply_data_size,
                                                     try_timeout ) ;
                printf("output:%s ",replyData);
            }while ( (end=_getch())==' ' );
        }
        IcmpCloseHandle(hIcmp6File);
        
    }
    
    delete source;
    freeaddrinfo(dest);
    delete[] requestData;

    delete[] replyData;

    WSACleanup();

}