Listbox with colored lines

Colored lines in listbox are more user-friendly and easy to read. Here is how to do it…
First of all, place ListBox component on a form and set Style property to lbOwnerDrawFixed. The rest is simple:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    ListBox1: TListBox;
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure ListBox1DrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  ListBox1.Style := lbOwnerDrawFixed;
end;

procedure TForm1.ListBox1DrawItem(Control: TWinControl; Index: Integer;  Rect: TRect; State: TOwnerDrawState);
begin
with Control as TListBox do
begin
  Canvas.FillRect(Rect);
  Canvas.Font.Color := TColor(Items.Objects[Index]);
  Canvas.TextOut(Rect.Left + 2, Rect.Top, Items[Index]);
end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 ListBox1.Items.AddObject('Red line', Pointer(clRed));
 ListBox1.Items.AddObject('Green line', Pointer(clGreen));
end;

end.

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