关于icmp.dll的问题，请问如果用它返回的参数当中有响应时间吗？有些什么参数？？100分


typedef unsigned long IPAddr;     // An IP address.typedef struct tagIP_OPTION_INFORMATION
{
  unsigned char      Ttl;              // Time To Live
  unsigned char      Tos;              // Type Of Service
  unsigned char      Flags;            // IP header flags
  unsigned char      OptionsSize;      // Size in bytes of options data
  unsigned char FAR *OptionsData;      // Pointer to options data
} IP_OPTION_INFORMATION;typedef struct tagICMP_ECHO_REPLY
{
  IPAddr                Address;       // Replying address
  unsigned long         Status;        // Reply IP_STATUS
  unsigned long         RoundTripTime; // RTT in milliseconds
  unsigned short        DataSize;      // Reply data size in bytes
  unsigned short        Reserved;      // Reserved for system use
  void FAR              *Data;         // Pointer to the reply data
  IP_OPTION_INFORMATION Options;       // Reply options
} ICMP_ECHO_REPLY;typedef IP_OPTION_INFORMATION FAR* LPIP_OPTION_INFORMATION;
typedef ICMP_ECHO_REPLY FAR* LPICMP_ECHO_REPLY;
typedef HANDLE (WINAPI IcmpCreateFile)(VOID);
typedef IcmpCreateFile* lpIcmpCreateFile;
typedef BOOL (WINAPI IcmpCloseHandle)(HANDLE IcmpHandle);
typedef IcmpCloseHandle* lpIcmpCloseHandle;
typedef DWORD (WINAPI IcmpSendEcho)(HANDLE IcmpHandle, IPAddr DestinationAddress,
                                    LPVOID RequestData, WORD RequestSize,
                                    LPIP_OPTION_INFORMATION RequestOptions,
                                    LPVOID ReplyBuffer, DWORD ReplySize, DWORD Timeout);
typedef IcmpSendEcho* lpIcmpSendEcho;