delphi XE2 将域名转IP

function HostToIP(Name: string; var Ip: string): Boolean;   //Delphi XE2 将域名转IP
var
wsdata : TWSAData;
hostName : array [0..255] of Ansichar;
hostEnt : PHostEnt;
addr : PAnsiChar;
begin
WSAStartup ($0101, wsdata);
try
    gethostname(hostName,sizeof(hostName));
    StrPCopy(hostName, Name);
    hostEnt := gethostbyname (hostName);
    if Assigned (hostEnt) then
      if Assigned (hostEnt^.h_addr_list) then begin
        addr := hostEnt^.h_addr_list^;
        if Assigned (addr) then begin
          IP := Format ('%d.%d.%d.%d', [byte (addr [0]),
          byte (addr [1]), byte (addr [2]), byte (addr [3])]);
          Result := True;
        end
        else
          Result := False;
      end
      else
        Result := False
    else begin
      Result := False;
    end;
finally
    WSACleanup;
end;
end;

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