unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);

  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
   LabelLeer;
   //Edit1.Text := 'Editbox1';
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Edit2.Text := 'Editbox2';
end;

procedure LabelLeer;
begin
  form1.Edit1.Text := '';
  form1.Edit2.Text := '';
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
   LabelLeer;
   //Edit2.Text := 'Editbox2';
end;
end.