再學 GDI+[30]: TGPPen - 用畫刷定義的畫筆

　本例效果圖:

　　代碼文件:unit Unit1;
interface
uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　Dialogs, StdCtrls, ExtCtrls;
type
　TForm1 = class(TForm)
　　RadioGroup1: TRadioGroup;
　　procedure FormCreate(Sender: TObject);
　　procedure FormPaint(Sender: TObject);
　　procedure RadioGroup1Click(Sender: TObject);
　end;
var
　Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ,GDIPAPI;
procedure TForm1.FormCreate(Sender: TObject);
begin
　RadioGroup1.Caption := '制作畫筆的畫刷';
　RadioGroup1.Items.CommaText := '實心畫刷,陰影畫刷,紋理畫刷,漸變畫刷';
　RadioGroup1.ItemIndex := 0;
end;
procedure TForm1.FormPaint(Sender: TObject);
var
　g: TGPGraphics;
　p: TGPPen;
　img: TGPImage;
　b: TGPBrush;
begin
　g := TGPGraphics.Create(Canvas.Handle);
　img := TGPImage.Create('c:tempsmall.jpg'); {文件要存在}
　case RadioGroup1.ItemIndex of
　　0: b := TGPSolidBrush.Create(aclRed);
　　1: b := TGPHatchBrush.Create(HatchStyleSolidDiamond, aclYellow, aclCornflowerBlue);
　　2: b := TGPTextureBrush.Create(img);
　　3: b := TGPLinearGradIEntBrush.Create(
　　　　 MakePoint(0,0),
　　　　 MakePoint(ClientWidth - RadioGroup1.Width, ClIEntHeight),
　　　　 aclYellow,
　　　　 aclRed
　　　 );
　end;
　p := TGPPen.Create(b, 24);
　g.DrawEllipse(p, 30, 30, ClientWidth-RadioGroup1.Width-60, ClIEntHeight-60);
　g.DrawLine(p, 0, 0, ClientWidth-RadioGroup1.Width, ClIEntHeight);
　img.Free;
　b.Free;
　p.Free;
　g.Free;
end;
procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
　Repaint;
end;
end.窗體文件:object Form1: TForm1
　Left = 0
　Top = 0
　Caption = 'Form1'
　ClIEntHeight = 206
　ClIEntWidth = 339
　Color = clBtnFace
　Font.Charset = DEFAULT_CHARSET
　Font.Color = clWindowText
　Font.Height = -11
　Font.Name = 'Tahoma'
　Font.Style = []
　OldCreateOrder = False
　Position = poDesktopCenter
　OnCreate = FormCreate
　OnPaint = FormPaint
　PixelsPerInch = 96
　TextHeight = 13
　object RadioGroup1: TRadioGroup
　　Left = 248
　　Top = 0
　　Width = 91
　　Height = 206
　　Align = alRight
　　Caption = 'RadioGroup1'
　　TabOrder = 0
　　OnClick = RadioGroup1Click
　end
end