Render an Office document in a WPF application

Dear all,

What is the proper way to render and office document like word, excel into a wpf application and be able to consult those document in a friendly way using touch.

Does the best way is to convert them into an XPS document and then render that document into a kind of wpf document control with page navigation ?

or is there an other solution ?

I guess we need to have office licence install to be able to do that no ?

thanks for advise

regards