delphi – 从TCustomControl继承时’Property Align不存在’

我创建了一个继承自TCustomcatontrol的自定义控件,并发布了属性Align of TControl.但是,当我在C Builder项目中使用此自定义控件时,它引发了异常

Project Launcher.exe引发异常类EReadError,并显示消息“属性对齐不存在”.

这是自定义控件的代码.

unit GameListCtrl;

interface

uses
  SysUtils,Classes,Controls;

type
  TGameList = class(TCustomcatontrol)
  private
  protected
    procedure Paint; override;
  public
    { Public declarations }
  published
    property Align default alLeft;
  end;

implementation

{ TGameList }

procedure TGameList.Paint;
begin
  inherited;
end;

end.