custom gui designer using WPF

Hi,

I am targetting VS2010/VS2012 and  I would like to create a simple gui editor for a custom gui framework. I already have a standalone wpf application and now I would like to integrate it inside a VS add-in. Is is still necessary with VS2010 to embedd WPF using a winform ElementHost ?

Do you have any minimal sample code that show a hello world window written in wpf ?

Thanks