How to change the value on the fly?

[Alexandre Machado]

There is a way of obtaining this result but the process can't be done in a blocking request (i.e. a request that won't return until the process is finished). In this regard, even an async request is a blocking request from the server point of view.

You need to start a background thread on the server side that will handle the long process. The thread should update a progress counter that is read by the TIWMonitor that can update the page. There is an example of such thing here:

https://github.com/Atozed/IntraWeb/tree/...IWMonitor2

I'll see if I write a better example on how to deal with long processes using the IWMonitor class