Hello Cristian Apavaloaiei,
Thank you for contacting us.
In your case I can suggest using the RadProgressBar control. It is designed to indicate the progress of a long-running process. The combination of RadProgressBar and WaitCursor will provide the user the needed information about the running process. At the same time the user will be able to browse through the rest of the application. I have prepared a sample project that illustrates this idea. Please refer to the attached file.
I hope you will find my suggestion useful. Please let me know whether it meets your expectations.
the Telerik team
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