Hi Mugur,
At the moment we have no support for creating hierarchical queries directly in WIM. We would have had to spend a lot of effort making our query builder as powerful as the one in Visual Studio and since our goal is to add value to TFS, we decided not to spend too much time in this area.
You can of course consume hierarchical queries created using the Visual Studio Team Explorer. Once you create a query there you should be able to open your project in WIM again and use the query.
Thanks,
Joel
the Telerik team
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