[NumLock]

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    RadioGroup1: TRadioGroup;
    Button1: TButton;
    Image1: TImage;
    Image2: TImage;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure MyPaint(Sender: TImage);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

procedure TForm1.MyPaint(Sender: TImage);
begin
  Sender.Canvas.Brush.Color:=clYellow;
  Sender.Canvas.FillRect(Sender.ClientRect);
  Sender.Canvas.Pen.Color:=clRed;
  Sender.Canvas.MoveTo(0, 0);
  Sender.Canvas.LineTo(Sender.ClientRect.Right, Sender.ClientRect.Bottom);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if RadioGroup1.ItemIndex=0 then MyPaint(Image1) else MyPaint(Image2);
end;

end.

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