创建异形窗口1

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormDblClick(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  rgn: HRGN;
begin
  BeginPath(Canvas.Handle);
  SetBKMode(Canvas.Handle, TRANSPARENT);
  Canvas.Font.Size := 56;
  Canvas.Font.Style := [fsBold];
  Canvas.TextOut(12, 12, 'Delphi');
  EndPath(Canvas.Handle);
  rgn := PathToRegion(Canvas.Handle);
  Self.Color := clRed;
  SetWindowRgn(Handle, rgn, True);
end;

procedure TForm1.FormDblClick(Sender: TObject);
begin
  Close;
end;

end.