Of course you could place a "TImage" component on your form and set its "Alignment" to "Client" in order to place a background image on your form. Here's another way:
Add following code to your form's "Public declarations" section:
bmpBackground : TBitmap;
Listing #1 : Delphi code. Download code (0.15 KB).
Double click on your form and add bitmap initialization code in the "FormCreate" event:
bmpBackground := TBitmap.Create;
bmpBackground.
LoadFromFile( 'c:windowssetup.bmp' );
Listing #2 : Delphi code. Download code2 (0.21 KB).
Go to the form's events list and double click on "OnPaint". Add following line to the "FormPaint" event:
Canvas.Draw( 0, 0, bmpBackground );
Listing #3 : Delphi code. Download code3 (0.16 KB).
Finally insert the following code in to the "FormDestroy" event ("OnDestroy" event):
bmpBackground.Free;