unit FMainForm;

interface

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

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

var
  Form1: TForm1; //

implementation

uses InterfaceDLLLoader, PrjInterface;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  dllInterface: IMyInterface;
begin
  with TInterfaceDLLLoader.Create() do
  begin
    dllInterface := GetInterface();
    ShowMessage(dllInterface.MyFunc());
    dllInterface := nil;
    free(); //
  end;
end;

end.