[Страдалецъ]

Ну вот так например:

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormPaint(Sender: TObject);
  private
    Bmp: TBitmap;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
 Bmp := TBitmap.Create;
 Bmp.LoadFromFile('C:\1.bmp');
end;

procedure TForm1.FormPaint(Sender: TObject);
begin
 Form1.Canvas.StretchDraw(Form1.ClientRect,Bmp);
end;

end.