Grafikprogrammierung: Frage

[Union]

Ich habe Deinen Source exakt kopiert, hier die komplette Unit:

Delphi-Quellcode:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Image1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
const
  PenStyle = PS_Geometric or PS_Solid;
var
  LogBrush: TLOGBRUSH;
begin
  LogBrush.lbStyle := BS_Solid;
  LogBrush.lbColor := Form1.Image1.Canvas.Pen.Color;
  LogBrush.lbHatch := 0;
  with Form1.Image1.Canvas do
  begin
    Pen.Handle := ExtCreatePen(PS_Geometric+PS_Dash+PS_Endcap_Square+PS_Join_Round, 50, LogBrush, 0, nil);
  end;
end;
procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer); 
begin 
  Image1.Canvas.MoveTo(x, y); 
end; 

procedure TForm1.Image1MouseUp(Sender: TObject; Button: TMouseButton; 
  Shift: TShiftState; X, Y: Integer); 
begin 
Image1.Canvas.LineTo(X, Y);
end;

end.

Und das Ergebnis sieht so aus (also schon eine fette Line wenn Du mich fragst):