getstockobjectu.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 GetStockObjectU;

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);
var
  ARegion: HRGN;     // holds a region
begin
  {create a region to be filled}
  ARegion := CreateRectRgn(20, 20, 190, 110);

  {fill the region with a stock brush}
  FillRgn(Canvas.Handle, ARegion, GetStockObject(BLACK_BRUSH));
end;

end.