[G.E.A.R.]

Так?

Скрытый текст:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    MainMenu1: TMainMenu;
    menu1: TMenuItem;
    procedure menu1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses Unit2;
{$R *.dfm}

procedure TForm1.menu1Click(Sender: TObject);
begin
  Procedure1;
end;

end.

unit Unit2;

interface

Procedure Procedure1;

implementation

uses Unit1;

Procedure Procedure1;
Begin
  Form1.Caption:='qwerty';
End;

end.