Canvas.StretchDraw

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses
  GDIPAPI,GDIPOBJ;
var
  bmp:TBitmap;
  gdibmp:TGPBitmap;
procedure TForm1.Button1Click(Sender: TObject);
begin
  bmp:=TBitmap.Create;
  bmp.LoadFromFile('d:\mm.bmp');
  Canvas.StretchDraw(ClientRect,bmp);
  bmp.Free;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  hb:HBITMAP;
begin
  gdibmp:=TGPBitmap.Create('d:\kk.jpg');
  gdibmp.GetHBITMAP(aclBlack,hb);
  bmp:=TBitmap.Create;
  bmp.Handle:=hb;
  Canvas.StretchDraw(ClientRect,bmp);
  bmp.Free;
  gdibmp.Free;
end;

end.