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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  x:integer;          {<----- an dieser Stelle?}

implementation

uses Unit2;

{$R *.dfm}
begin
...
end.