VC调用ICMP.DLL完成Ping的工作

lj改好的：

#define PING_INVALID_ADDRESS    0 
#define INVALID_ICMPHANDLE      1 
#define PING_SUCCESS            2

#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "Mpr.lib")
#include <Iphlpapi.h>
#pragma comment(lib, "Iphlpapi.lib")
#pragma comment(lib,"Netapi32.lib")
#include <icmpapi.h>

DWORD CPingDlg::DoPing(CString & address,int& RequestTime) 
{ 
    struct hostent *hp; 
    IPAddr Destination; 
    
    hp = gethostbyname(address); 
    if(!hp) 
    { 
        Destination = inet_addr(address); 
        if(Destination == INADDR_NONE) 
            return PING_INVALID_ADDRESS; 
    } 
    else 
        memcpy(&Destination ,hp->h_addr,hp->h_length); 
    
    HANDLE ICMPHandle;