再学 GDI+[3]: DrawRectangle - 绘制矩形[转]

unit Unit1;

 

interface

 

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs;

 

type

  TForm1 = class(TForm)

    procedure FormPaint(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

  end;

 

var

  Form1: TForm1;

 

implementation

 

{$R *.dfm}

uses

  GDIPOBJ,GDIPAPI;

procedure TForm1.FormPaint(Sender: TObject);

var

  g:TGPGraphics;

  p:TGPPen;

  x,y:Single;

const

  w = 100;

  h = 50;

begin

  g:=TGPGraphics.Create(Canvas.Handle);

  g.Clear(aclWhite);

  p:=TGPPen.Create(0,2);

 

  x:=20;

  y:=20;

 

  p.SetColor(aclRed);

  g.DrawRectangle(p,x,y,w,h);

 

  p.SetColor(aclGold);

  x:=x + w/2;

  y:=y + h/2;

  g.DrawRectangle(p,MakeRect(x,y,w,h));

 

  p.Free;

  g.Free;

end;

 

end.