Link - Freeing main UI thread while downloading
From Visual WebGui Wiki
Overview
When downloading big files via a Gateway, the main UI thread of your application is unresponsive until the download is finished. This means the user must wait for the download to complete before anything else can be done in the UI of your app.
A neat trick is to use Link.Open for the download "call" which effectively frees your UI while the download is taking place in that new other window you created.
