The specfic example in the first link can easily be replicated with no
special controls plus some good .png type graphic files created in
PhotoShop or similiar app.  It is a dialog type form, not sizeable,
and has no other native controls that would display elements of the
default visual style. But in a multiform application, one would
probably want to use a "complete" skin control:
http://www.sunisoft.com/irisskin/index.htm
http://www.skincrafter.com/

In the second link, the only special control item is the
NavigationBar.  Here is one example:
http://www.devexpress.com/Products/NET/XtraNavBar/

Gene