unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure
 
 Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
 

  p,p1,p2: PChar;
begin
  p1 := 'Delphi';
  p2 := '2009';

  GetMem(p, 256);
  p^ := #0;

  lstrcat(p, p1);
  lstrcat(p, ' ');
  lstrcat(p, p2);

  ShowMessage(p); {Delphi 2009}

  FreeMem(p);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  p1,p2: PChar;
  buf: array
 
[0..255] of Char;
begin
  p1 := 'Delphi';
  p2 := '2009';

  FillChar(buf, Length(buf), #0);

  lstrcat(buf, p1);
  lstrcat(buf, ' ');
  lstrcat(buf, p2);

  ShowMessage(buf); {Delphi 2009}
end;


procedure TForm1.Button3Click(Sender: TObject);
var
  p,p1,p2: PChar;
begin
  p1 := 'Delphi';
  p2 := '2009';
  p := GetMemory(256);

  lstrcpy(p, p1);

  lstrcat(p, ' ');
  lstrcat(p, p2);

  ShowMessage(p); {Delphi 2009}

  FreeMemory(p);
end;


var
  buf: array[0..255] of Char;
procedure TForm1.Button4Click(Sender: TObject);
var
  p1,p2: PChar;
begin
  p1 := '萬一的 ';
  p2 := 'Delphi 部落格';

  lstrcat(buf, p1);
  lstrcat(buf, p2);

  ShowMessage(buf); {萬一的 Delphi 部落格}
end;

end.