WebPanel Events for Host

Using a WebPanel to host forms I see the need of a Event like OnHost, or something that I can treat that Panel like OnCreate.
And the passed parameter is AForm:TObject as the passed parameter on @AfterCreate closure of CreateNew();

Example of code:
being him:

frm : TWebForm;
procedure TFrmMain.FormShow(Sender: TObject);
procedure AfterCreate(AForm : TObject);
begin
// Do Something
end;
begin
frm := TfrmTabs.CreateNew(HostPanel.ElementID,@AfterCreate);
end;

The code I think was be :

Everytime that execute this code for example : frm := TfrmTabs.CreateNew(HostPanel.ElementID,@AfterCreate);
and automatically execute OnHost.

procedure TFrmMain.FormHost(AForm : TObject);
begin

end;

With OnHost, everytime that WebPanel Host any form, do something, using only AfterCreate and OnCreate or OnShow of Form ,it's time consuming to do, OnHost it's more easy to treat and only one time