I suggest you take a look at the Monitoring Custom Progress online example
which demonstrates the scenario you describe. You can replace the standard html file input with a RadUpload control.
We checked your account and noticed that you have not downloaded any version of RadControls from our site. Since it is our policy to support only registered users, could you please share how you obtained our products? Maybe you downloaded them under a different account. If so, please share it with us so we can update our records and provide you with adequate services.
As soon as I get your reply, I will evaluate your standing. We will appreciate your feedback on this matter.
All the best,
the Telerik team