代码：
.h
#pragma once
#include <WinSock.h>
// ping 操作接口
typedef struct ip_option_information {
	UCHAR Ttl;
	UCHAR Tos;
	UCHAR Flags;
	UCHAR OptionsSize;
	PUCHAR OptionsData;
} IP_OPTION_INFORMATION, *PIP_OPTION_INFORMATION;

typedef struct icmp_echo_reply
{
	ULONG Address;
	ULONG Status;
	ULONG RoundTripTime;		// 往返时间
	USHORT DataSize;
	USHORT Reserved;
	PVOID Data;
	IP_OPTION_INFORMATION Options;
} ICMP_ECHO_REPLY, *PICMP_ECHO_REPLY; 
typedef HANDLE (WINAPI IcmpCreateFile)(VOID);
typedef BOOL (WINAPI IcmpCloseHandle)(HANDLE IcmpHandle);
typedef DWORD (WINAPI IcmpSendEcho)(
						// 传入由IcmpCreateFile创建的一个测试句柄
						HANDLE IcmpHandle,
						// 要测试的IP地址,(需要用到inet_addr() 函数来转换) 
						ULONG DestinationAddress,
						// 需要发送到IP地址的数据,传入指针
						LPVOID RequestData,
						// 发送的数据大小
						WORD RequestSize,
						// IP头选项,传入指针 
						PIP_OPTION_INFORMATION RequestOptions,
						// 测试后返回的数据,用icmp_echo_reply来接收
						LPVOID ReplyBuffer,
						// ReplyBuffer的大小,一般是 sizeof(icmp_echo_reply) 
						DWORD ReplySize,
						// 一个以MS为单位的值,代表着一个超时值
						DWORD Timeout);
class CPingI
{
public:
	CPingI();
	~CPingI();
	BOOL Ping(int timeout, LPCTSTR pHost);
private:
	HINSTANCE hIcmpDLL;
	IcmpCreateFile* lpIcmpCreateFile;
	IcmpCloseHandle* lpIcmpCloseHandle;
	IcmpSendEcho* lpIcmpSendEcho;
};


.cpp
#include "stdafx.h"
#include "PingI.h"

CPingI::CPingI()
{
	// load
	hIcmpDLL = LoadLibrary("ICMP.DLL");
	if (hIcmpDLL == NULL)
	{
		return;
	}
	lpIcmpCreateFile = (IcmpCreateFile*)GetProcAddress(hIcmpDLL,"IcmpCreateFile");
	lpIcmpCloseHandle = (IcmpCloseHandle*)GetProcAddress(hIcmpDLL,"IcmpCloseHandle");
	lpIcmpSendEcho = (IcmpSendEcho*)GetProcAddress(hIcmpDLL,"IcmpSendEcho");

	if (lpIcmpSendEcho == NULL || lpIcmpCloseHandle == NULL || lpIcmpCreateFile == NULL)
	{
		return;
	}
}
CPingI::~CPingI()
{
	if (hIcmpDLL != NULL)
	{
		FreeLibrary(hIcmpDLL);
		hIcmpDLL = NULL;
	}
}

// ping x.x.x.x
BOOL CPingI::Ping(int timeout, LPCTSTR pHost)
{
	IP_OPTION_INFORMATION ip_option;
	UCHAR sendData[128];
	UCHAR recData[128];
	HANDLE handle;
	PICMP_ECHO_REPLY pEchoReply;
	// 应答个数
	int nReply;
	// error
	if (lpIcmpSendEcho == NULL || lpIcmpCloseHandle == NULL || lpIcmpCreateFile == NULL)
	{
		return FALSE;
	}
	
	memset(&ip_option, 0, sizeof(IP_OPTION_INFORMATION));
	// TTL
	ip_option.Ttl = 128;
	
	// send Data
	memset(sendData, '1', 128);

	// rec Data
	memset(recData, 0, 128);

	pEchoReply = (PICMP_ECHO_REPLY)recData;

	// create handle
	handle = lpIcmpCreateFile();
	if (handle == INVALID_HANDLE_VALUE)
	{
		return FALSE;
	}
	
	// send
	nReply = lpIcmpSendEcho(handle, 
					   inet_addr(pHost),
					   sendData,
					   64,
					   &ip_option,
					   pEchoReply,
					   sizeof(ICMP_ECHO_REPLY) + 64,
					   timeout);

	// close
	lpIcmpCloseHandle(handle);
	if (nReply == 0)
	{
		// GetLastErr
		SetLastError(pEchoReply->Status);
		return FALSE;
	}
	return TRUE;
}