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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    Image2: TImage;
    Button1: TButton;
    procedure MyImageMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
implementation

{$R *.DFM}

procedure TForm1.MyImageMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var aPoint : TPoint;
begin
  aPoint := Point(X,Y);
  //Image-Koordinaten in Form-Koordinaten umrechnen
  aPoint  := TImage(Sender).ClientToScreen(ScreenToClient(aPoint));
  Caption := TImage(Sender).Name+'      '
             +IntToStr(Canvas.Pixels[aPoint.X,aPoint.Y]);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  Bitmap : TBitMap;
begin                                     
  Image1.Left := 50;
  Image1.Top := 50;
  Image2.Left := 60;
  Image2.Top := 60;
  Bitmap := TBitmap.Create;
  try
    Bitmap.LoadFromFile('C:\temp\Orchidee.bmp');
    Canvas.Draw(0,0,Bitmap);
  finally
    Bitmap.Free;
  end;
  Image1.Picture.Icon.LoadFromFile('C:\temp\google.ico');
  Image2.Picture.Icon.LoadFromFile('C:\temp\gmx.ico');
end;

end.