Knowing the URL of the Browser with Delphi

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Label1: TLabel;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

uses ddeman;

procedure TForm1.Button1Click(Sender: TObject);
const
sName = 'Name';
sURL = 'URL';
var
DDEClient : TDDEClientConv;
s : string;
begin
s := '';
try
DDEClient := TDDEClientConv.Create(self);
try
with DDEClient do
begin
if SetLink('IExplore','WWW_GetWindowInfo') then
s := RequestData('0xFFFFFFFF,sURL,sTitle')
else
if SetLink('Netscape','WWW_GetWindowInfo') then
s := RequestData('0xFFFFFFFF,sURL,sTitle')
else
if SetLink('Mosaic','WWW_GetWindowInfo') then
s := RequestData('0xFFFFFFFF,sURL,sTitle')
else
if SetLink('Netscp6','WWW_GetWindowInfo') then
s := RequestData('0xFFFFFFFF,sURL,sTitle')
else
if SetLink('Mozilla','WWW_GetWindowInfo') then
s := RequestData('0xFFFFFFFF,sURL,sTitle');
end;
finally
Edit1.Text := s;
DDEClient.Free;
end;
except
end;
end;

end.