Trouble adding menu items in a project I am converting from VCL to WEB Core

program WebC_UI_0;

uses
Vcl.Forms,
WEBLib.Forms,
WC_UI_0 in 'WC_UI_0.pas' {MainForm: TWebForm} {.html},
Unit1 in 'Unit1.pas' {Form1: TWebForm} {
.html};

{$R *.res}

begin
Application.Initialize;
Application.MainFormOnTaskbar := True;
Application.CreateForm(TMainForm, MainForm);
Application.CreateForm(TForm1, Form1);
Application.Run;
end.