fazer um radio no delphi

unit Un_radio;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Buttons, ComCtrls, StdCtrls, OleCtrls, SHDocVw, ExtCtrls;

type
  TForm1 = class(TForm)
    ListBox1: TListBox;
    Edit1: TEdit;
    TBVolume: TTrackBar;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    Panel1: TPanel;
    SpeedButton3: TSpeedButton;
    Edt_indique: TEdit;
    wb: TWebBrowser;
    procedure FormActivate(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
    procedure TBVolumeChange(Sender: TObject);
    procedure SpeedButton2Click(Sender: TObject);
    procedure ListBox1Click(Sender: TObject);
    procedure SpeedButton3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
   wb: TWebBrowser;
implementation
{$R *.dfm}
        uses MMSystem;

procedure TForm1.FormActivate(Sender: TObject);
begin
wb := TWebBrowser.Create(Form1);
  TWinControl(wb).Name := 'MyWebBrowser';
  //TWinControl(wb).Parent := Form1;
  //wb.Hide; // deixar o WebBrowser invisivel
end;

procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
 wb.Navigate(edit1.text);
end;

procedure TForm1.TBVolumeChange(Sender: TObject);
var
Count, i: integer;
begin
   Count := waveOutGetNumDevs;
   for i := 0 to Count do
     begin
        waveOutSetVolume(i,longint(tbVolume.position*4369)*65536+longint(tbVolume.position*4369));
     end;
end;

procedure TForm1.SpeedButton2Click(Sender: TObject);
begin
halt;
end;

procedure TForm1.ListBox1Click(Sender: TObject);
begin
wb.Stop;
   edit1.clear;
 edit1.text := 'http://www.radios.com.br/play/'+ trim(ListBox1.Items[ListBox1.itemindex]);

     end;

procedure TForm1.SpeedButton3Click(Sender: TObject);
begin
 wb.Navigate(Edt_indique.text);
end;

end.