Unit MainForm;

interface

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

type
  TMainFrm = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormClose(Sender: TObject; 
                                            var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
   MainFrm: TMainFrm;

implementation

procedure ShowDLLForm; stdcall; external 'FRMLIB.DLL';
procedure CloseDLLForm; stdcall; external 'FRMLIB.DLL';

{$R *.DFM}

procedure  TMainFrm.Button1Click(Sender: TObject);
begin
      ShowDLLForm();  
end;

procedure  TMainFrm.FormClose(Sender: TObject; 
                                                      var Action: TCloseAction);
begin
   CloseDLLForm();
end;

end.
