unit Pixels;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.dfm}

// BeginExample: Pixels
// Property: Graphics.TCanvas.Pixels

// BeginCode
{
This example draws a red line (very slowly) when the user 
presses a button. Attach the following code to the button’s 
OnClick event handler:
} 
procedure TForm1.Button1Click(Sender: TObject);
var
  W: Word;
begin
    for W := 10 to 200 do
      Canvas.Pixels[W, 10] := clRed;
end;
// EndCode
// EndExample: Pixels
end.
