delphi xe 取得主机名和主板IP地址

直接上代码（delphi xe 10.3通过）

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses    Winapi.Winsock;

Function GetIPAddress:String;
type
  pu_long = ^u_long;
var
  varTWSAData: TWSAData;
  varPHostEnt: PHostEnt;
  varTInAddr: TInAddr;
  namebuf: Array[0..255] of AnsiChar;
begin
  if WSAStartup($101, varTWSAData) <> 0 then
    Result := '127.0.0.1'
  else
  begin
    gethostname(namebuf, sizeof(namebuf));
    varPHostEnt := gethostbyname(namebuf);
    varTInAddr.S_addr := u_long(pu_long(varPHostEnt^.h_addr_list^)^);
    Result := '' + inet_ntoa(varTInAddr);
  end;
  WSACleanup;
end;

Function gethostnames:String;
type
    pu_long = ^u_long;
var
    varTWSAData: TWSAData;
    varPHostEnt: PHostEnt;
    varTInAddr: TInAddr;
    namebuf: Array[0..255] of AnsiChar;
begin
  if WSAStartup($101, varTWSAData) <> 0 then
    Result := '127.0.0.1'
  else
  begin
    gethostname(namebuf, sizeof(namebuf));
    Result := namebuf;
  end;
  WSACleanup;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
form1.Caption:= getIPAddress+'  '+gethostnames;
end;

end.