网上的实现Ping功能的代码很多，以前用过一段代码，在windows user组用户下操作会失败，下面贴出一个可用的

// PING.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <winsock2.h>
#include <iphlpapi.h>
#include <icmpapi.h>
#include <stdlib.h>
#include <stdio.h>

#pragma comment(lib, "iphlpapi.lib")
#pragma comment(lib, "ws2_32.lib")

int MyPing(const char *szIp)
{
    // Declare and initialize variables
    HANDLE hIcmpFile;
    unsigned long ipaddr = INADDR_NONE;
    DWORD dwRetVal = 0;
    DWORD dwError = 0;
    char SendData[] = "Data Buffer";
    LPVOID ReplyBuffer = NULL;
    DWORD ReplySize = 0;
    // Validate the parameters
    ipaddr = inet_addr(szIp);
    hIcmpFile = IcmpCreateFile();
    if (hIcmpFile == INVALID_HANDLE_VALUE) {
        printf("\tUnable to open handle.\n");
        printf("IcmpCreatefile returned error: %ld\n", GetLastError());
        return 1;
    }
    // Allocate space for at a single reply
    ReplySize = sizeof (ICMP_ECHO_REPLY) + sizeof (SendData) + 8;
    ReplyBuffer = (VOID *)malloc(ReplySize);
    if (ReplyBuffer == NULL) {
        printf("\tUnable to allocate memory for reply buffer\n");
        return 1;
    }
    dwRetVal = IcmpSendEcho2(hIcmpFile, NULL, NULL, NULL,
        ipaddr, SendData, sizeof (SendData), NULL,
        ReplyBuffer, ReplySize, 1000);
    if (dwRetVal != 0) {
        PICMP_ECHO_REPLY pEchoReply = (PICMP_ECHO_REPLY) ReplyBuffer;
        struct in_addr ReplyAddr;
        ReplyAddr.S_un.S_addr = pEchoReply->Address;
        printf("\tSent icmp message to %s\n", szIp);
        if (dwRetVal > 1) {
            printf("\tReceived %ld icmp message responses\n", dwRetVal);
            printf("\tInformation from the first response:\n");
        } else {
            printf("\tReceived %ld icmp message response\n", dwRetVal);
            printf("\tInformation from this response:\n");
        }
        printf("\t  Received from %s\n", inet_ntoa(ReplyAddr));
        printf("\t  Status = %ld  ", pEchoReply->Status);
        switch (pEchoReply->Status) {
        case IP_DEST_HOST_UNREACHABLE:
            printf("(Destination host was unreachable)\n");
            break;
        case IP_DEST_NET_UNREACHABLE:
            printf("(Destination Network was unreachable)\n");
            break;
        case IP_REQ_TIMED_OUT:
            printf("(Request timed out)\n");
            break;
        default:
            printf("\n");
            break;
        }
        printf("\t  Roundtrip time = %ld milliseconds\n",
            pEchoReply->RoundTripTime);
        free(ReplyBuffer);
    } else {
        printf("Call to IcmpSendEcho2 failed.\n");
        dwError = GetLastError();
        switch (dwError) {
        case IP_BUF_TOO_SMALL:
            printf("\tReplyBufferSize to small\n");
            break;
        case IP_REQ_TIMED_OUT:
            printf("\tRequest timed out\n");
            break;
        default:
            printf("\tExtended error returned: %ld\n", dwError);
            break;
        }
        return 1;
    }
    return 0;
}

int main(int argc, char* argv[])
{
    printf("\n%d\n",  MyPing("192.168.0.103"));
}

Windows下Ping功能的实现（VC++）