unit Main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdBaseComponent, IdComponent, IdUDPBase, IdUDPClient, StdCtrls,
  IdIPWatch;

type
  TForm1 = class(TForm)
    IdUDPClient: TIdUDPClient;
    btnSend: TButton;
    edInfo: TEdit;
    edServerHost: TEdit;
    edServerPort: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    IdIPWatch: TIdIPWatch;
    procedure btnSendClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.btnSendClick(Sender: TObject);
begin
  IdUDPClient.Send(edServerHost.Text, StrToInt(edServerPort.Text), edInfo.Text);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  edServerHost.Text := IdIPWatch.LocalIP;
end;

end.