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procedure TForm1.Button1Click(Sender: TObject);
begin
application.createform(TForm2,Form2);
form2.show;
end;					

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Form2 := TForm2.Create(Self);
...					

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program Project1;

uses
  Forms,
  Unit1 in 'Unit1.pas' {Form1},
  Unit2 in 'Unit2.pas' {Form2};

{$R *.res}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.					

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unit Unit1;

interface

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

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

var
  Form1: TForm1;

implementation

uses unit2;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
application.createform(TForm2,Form2);
form2.show;
end;

end.					

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unit unit2;

interface

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

type
  TForm2 = class(TForm)
    ScrollBar1: TScrollBar;
    Paintbox1: TPaintBox;
    Edit1: TEdit;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure PaintBox1Paint(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure ScrollBar1Scroll(Sender: TObject; ScrollCode: TScrollCode;
      var ScrollPos: Integer);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form2:  TForm2;
  mylist: TStringlist;
  bmp:    TBitmap;
  weite:  integer;
  zeilen: integer;

implementation

{$R *.dfm}

procedure TForm2.FormCreate(Sender: TObject);
begin

mylist:=TStringlist.create;
mylist.loadfromfile('c:\ort\017.txt');

bmp := TBitmap.create;
bmp.canvas.Brush.color:=clwhite;
bmp.canvas.Pen.width:=1;
bmp.Width:=paintbox1.width;
bmp.Height:=paintbox1.Height;

weite:=round(mylist.count/paintbox1.width);
{edit2.Text:=inttostr(mylist.count);
edit3.Text:=inttostr(weite);}
scrollbar1.Max:=round(mylist.count/weite);
end;

procedure TForm2.FormDestroy(Sender: TObject);
begin
bmp.free;
end;


procedure TForm2.PaintBox1Paint(Sender: TObject);
begin
BitBlt(Paintbox1.canvas.Handle,0,0,bmp.Width, bmp.Height, bmp.canvas.Handle,0,0,SrcCopy);
end;

procedure TForm2.Button1Click(Sender: TObject);
var i:integer;
begin

bmp.canvas.moveto(0,paintbox1.height div 2);

for i:=1 to paintbox1.width do
 begin
    bmp.canvas.lineto(i,round(-10*strtofloat(mylist[i]))+paintbox1.height div 2);
 end;
 paintbox1.Repaint;
end;


procedure TForm2.ScrollBar1Scroll(Sender: TObject; ScrollCode: TScrollCode;
  var ScrollPos: Integer);

  var i :integer;

  begin

  bmp.canvas.Rectangle(0,0,clientwidth,clientheight);
  {edit1.Text:=inttostr(scrollbar1.position);}
  bmp.canvas.moveto(paintbox1.width,paintbox1.height div 2);
  bmp.canvas.lineto(0,paintbox1.height div 2);

for i:=1 to paintbox1.width do
 begin
    if (i+weite*scrollbar1.position) < (mylist.Count-1) then
    bmp.canvas.lineto(i,round(-10*strtofloat(mylist[i+weite*scrollbar1.position]))+paintbox1.height div 2);
 end;
 paintbox1.Repaint;

end;

end.