[Lazarus] Show image on the backgroud of a Form

[lazarusportugalwebmasters at gmail.com]

Hi.
I got this code at the event on show:
    background := TBitmap.Create;
    background.LoadFromFile({Cadeia+'\180px-Grid.bmp}'C:\Documents and 
Settings\Daniel\Ambiente de trabalho\qqwing\180px-Grid.bmp');
    Form1.Canvas.Draw(0,0,background);
But it no show any image on the backgroud of my Form.
This code is from 
http://www.codefoot.com/delphi/form_background_image.shtml .

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