Auto Refresh SharePoint page from InfoPath form

[Chris]

We have an InfoPath form that used in a SharePoint list. It has custom
(managed) code that submits and saves to SharePoint.

When I create a new InfoPath item from SharePoint, put in the required data
and save, everything works correctly. When I close the InfoPath form, the
SharePoint page updates automatically.

If I edit an existing InfoPath form from SharePoint and close the form, the
data is updated but I have to refresh the SharePoint page to see the changes.

How is the SharePoint page being refreshed when submitting a new form? Is
there managed code I can add to refresh the SharePoint page when closing the
InfoPath form on a edit?

Thanks,
Chris