How to create WPF Application Preloader (like one on this Word 2010)?

How to create WPF Application Preloader (like one on this Word 2010 Prt Scrn)? Drag able and 开发者_JS百科Close able=)

_{(source: narod.ru)}

we have WPF spalsh screens. Its just a normal window that runs at startup an listens for 'started' event and disappears.

WPF splash screens is only an Image to do a dragable & closable one I guess that you do it as a window that is the first to show and then in the background the app windows is created to at last be displayed and close the "splash".