[NumLock]

Код:

library ProjectDll1;

function Test: Boolean;
begin
  Result:=True;
end;

exports Test;

begin
end. 

Код:

unit Unit1;

interface

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

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

function Test: Boolean; external 'ProjectDll1.dll';  

var
  Form1: TForm1;

implementation

{$R *.dfm}

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

end. 

http://data.cod.ru/71911