Attempt to get Visio Class Diagrams from VS XSD files.

I wanted to have a diagram from .Net Dataset (stored as XSD) and include elements from XSD generated from WCF service.
I found that is not supported by MS tools. Dataset Designer doesn’t have any export facility.XSD files generated from WCF service, do not have any graphical interface at all.
I ended up with manually drawing in Visio objects used by WCF service and merge PrintScreens from VS Dataset Designer and Visio Class Diagram in Paint.Not a nice solution.
 I’ve posted a suggestion “Ability to export diagrams from XSD files.”. to MS.
Below are the links that I’ve read to find the solution.
From the thread “Import XSD to Visio?” :”The only way I know of is to write a little visio add-on using Visio SDK that reads the xsd and creates the corresponding Vision shapes”
Design and Generate Code with VisioVisio for Enterprise Architects
sparxsystems Enterprise Architect Modeling & Design Tools for your Enterprise -actually didn’t try.