How can I add the current TWebbrowser site to the favorites?

Problem/Question/Abstract:

How can I add the current TWebbrowser site to the favorites?

Answer:

// You need: 1 TEdit, 2 TButtons, 1 TWebbrowser

const
  NotAllowed: set of Char = ['"'] + ['/'] + ['\'] + ['?'] + [':'] + ['*'] +
  ['<'] + ['>'] + ['|'];

implementation

{$R *.DFM}

function Load(Path, Key: string): string;
var
  Reg: TRegistry;
begin
  Reg := TRegistry.Create;
  try
    Reg.RootKey := HKEY_CURRENT_USER;
    Reg.OpenKey(Path, False);
    try
      Result := Reg.ReadString(Key);
    except
      Result := '';
    end;
    Reg.CloseKey;
  finally
    Reg.Free;
  end;
end;

function WinDir: string;
var
  WinDir: PChar;
begin
  WinDir := StrAlloc(MAX_PATH);
  GetWindowsDirectory(WinDir, MAX_PATH);
  Result := string(WinDir);
  if Result[Length(Result)] <> '\' then
    Result := Result + '\';
  StrDispose(WinDir);
end;

function GetSysDir: string;
var
  dir: array[0..MAX_PATH] of Char;
begin
  GetSystemDirectory(dir, MAX_PATH);
  Result := StrPas(dir);
end;

// Navigate to a page

procedure TForm1.Button1Click(Sender: TObject);
begin
  Webbrowser1.Navigate(edit1.Text);
end;

// Add the current page to the favorites

procedure TForm1.Button2Click(Sender: TObject);
var
  url: TStringList;
  fav: string;
  title, b: string;
  i: Integer;
  c: Char;
begin
  fav := Load('Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders',
    'Favorites');
  url := TStringList.Create;
  try
    url.Add('[InternetShortcut]');
    url.Add('URL=' + webbrowser1.LocationURL);
    url.Add('WorkingDirectory=' + WinDir());
    url.Add('IconIndex=0');
    url.Add('ShowCommand=7');
    url.Add('IconFile=' + GetSysDir() + '\url.dll');
    title := Webbrowser1.LocationName;
    b := '';
    for i := 1 to Length(title) do
    begin
      c := title[i];
      if not (c in NotAllowed) then
      begin
        b := b + Webbrowser1.LocationName[i];
      end;
    end;
    url.SaveToFile(fav + '\' + b + '.url');
  finally
    url.Free;
  end;
end;

end.