直接獲取IP地址的函數

uses
  WinSock, ComObj

//獲得本地IP
function GetLocalIP: String;
type
  TaPInAddr = Array[0..10] of PInAddr;
  PaPInAddr = ^TaPInAddr;
var
  phe: PHostEnt;
  pptr: PaPInAddr;
  Buffer: Array[0..63] of AnsiChar;
  i: Integer;
  GInitData: TWSAData;
begin
  WSAStartup($101, GInitData);
  Result := '';
  GetHostName(Buffer, SizeOf(Buffer));
  phe := GetHostByName(buffer);
  if phe = nil then Exit;
  pPtr := PaPInAddr(phe^.h_addr_list);
  i := 0;
  while pPtr^[i] <> nil do
  begin
    Result := inet_ntoa(pptr^[i]^);
    Inc(i);
  end;
  WSACleanup;
end;

//獲得外網IP
function GetIP: string;
var
   xml : OleVariant;
   r:string;
   p1,p2 : Integer;
begin
   xml := CreateOleObject('Microsoft.XMLHTTP');
   xml.Open('GET','http://www.net.cn/static/customercare/yourIP.asp', False);
   xml.Send;
   r := xml.responseText;
   p1:=Pos('<h2>',r);  // 找到 h2 標籤
   p2:=Pos('</h2>',r);  // 找到 h2 結束標籤
   Result := Copy(r, p1+4, p2-p1-4);
end;