I'm trying to build automated tests for an application that has only bits of it implemented in Silverlight. When I connect to the path of the application it sends this error: "It's not a valid Wpf Application!" 

Does this mean that I can't record any of the test steps for this program? 

Hi Alex,

This is a warning we identify the desktop application you're going to automate is not a pure WPF application so you may expect some recording issues. For example some part of the application is probably WinForms-based so you will not be able to automate that. You can read more about that in the docs here.

Kind regards,
Konstantin Petkov
the Telerik team