chordunit.pas

DelphiWin32核心API参考光盘内容.是学习书籍中的源码,便于学习.

unit ChordUnit;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
  {initialize the brush and pen used to draw the chord}
  Canvas.Brush.Color := clLime;
  Canvas.Brush.Style := bsCross;
  Canvas.Pen.Color := clRed;

  {draw a chord}
  Chord(Canvas.Handle, 10, 10, 110, 110, 110, 85, 10, 85);
end;

end.