unit1.pas

这有很多Delphi应用的例子

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Shape1: TShape;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    procedure ButtonEllipseClick(Sender: TObject);
    procedure ButtonRectangleClick(Sender: TObject);
    procedure ButtonRoundRectClick(Sender: TObject);
    procedure ButtonRoundSquareClick(Sender: TObject);
    procedure ButtonCircleClick(Sender: TObject);
    procedure ButtonSquareClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ButtonEllipseClick(Sender: TObject);
begin
  Shape1.Shape:=stEllipse;
end;

procedure TForm1.ButtonRectangleClick(Sender: TObject);
begin
   Shape1.Shape:=stRectangle;
end;

procedure TForm1.ButtonRoundRectClick(Sender: TObject);
begin
   Shape1.Shape:=stRoundRect;
end;

procedure TForm1.ButtonRoundSquareClick(Sender: TObject);
begin
   Shape1.Shape:=stRoundSquare;
end;

procedure TForm1.ButtonSquareClick(Sender: TObject);
begin
   Shape1.Shape:=stSquare;
end;

procedure TForm1.ButtonCircleClick(Sender: TObject);
begin
   Shape1.Shape:=stCircle;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Shape1.Brush.Color:=clGreen;
  Shape1.Brush.Style:=bsBDiagonal;
  Shape1.Pen.Color:=clBlue;
  Shape1.Pen.Width:=10;
end;

end.