sub.dll파일을 생성하고, 메인 폼의 panel1에 집어 넣으려 합니다.
에러가 발생하고 있습니다. 무엇이 문제인지 알고 싶습니다.

<!--CodeS-->

unit umain;        //메인 폼

interface

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

type
  TfrmMain = class(TForm)
    Button1: TButton;
    Panel1: TPanel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmMain: TfrmMain;

implementation

{$R *.dfm}
procedure ShowTestForm(AHandle : THandle ; Parent : TWinControl); stdCall;external 'sub.dll';

procedure TfrmMain.Button1Click(Sender: TObject);
begin
     ShowTestForm(Application.Handle, Panel1);
end;

end.


library sub; //sub.dll 파일

{ Important note about DLL memory management: ShareMem must be the
  first unit in your library's USES clause AND your project's (select
  Project-View Source) USES clause if your DLL exports any procedures or
  functions that pass strings as parameters or function results. This
  applies to all strings passed to and from your DLL--even those that
  are nested in records and classes. ShareMem is the interface unit to
  the BORLNDMM.DLL shared memory manager, which must be deployed along
  with your DLL. To avoid using BORLNDMM.DLL, pass string information
  using PChar or ShortString parameters. }

uses
  SysUtils,
  Classes,
  usub in 'usub.pas' {frmSub};

{$R *.res}
exports
       ShowTestForm;

begin
end



unit usub; // sub에 속한 Form파일

interface

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

type
  TfrmSub = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;
procedure ShowTestForm(AHandle : THandle; Parent : TWinControl); stdCall;
var
  frmSub: TfrmSub;

implementation

{$R *.dfm}

procedure ShowTestForm(AHandle : THandle ; Parent : TWinControl); stdCall;
var ef : TfrmSub;
begin
     Application.Handle := AHandle;
     ef := TfrmSub.Create(Application);
     ef.BorderIcons := [];
     ef.BorderStyle := bsSizeToolWin;
     ef.Show;
end;
end.

<!--CodeE-->