unit MAINFRM;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

type

PShareData = ^TShareData;  
TShareData = record         
   I: Integer;
end;

var data:PShareData;     

procedure GetSharedData(var Data: PShareData);
                                          stdcall; external 'SHARELIB.DLL';

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
      GetSharedData(Data); 
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  inc(data^.I);   
  ShowMessage(intToStr(data^.I));
end;

end.
