Vista - WPF gadget

I have a WPF application(It is not XBAP yet, do we have to convert it to
XBAP to make it work with the sidebar, if have to, anyway, to convert it to
XBAP is not very difficult), I want it has the functionalities of Gadget
when running in Vista. The questions breaks down as following:
1. What window style make the WPF application dock-able to the sidebar?
2. How does the application know it is on the sidebar or not, I want it
has different mode, simple one and full one,
when it is on the sidebar, it shows the simple one, otherwise, when it is
running in standalone mode, it shows the full one , is this possible?
3. How to implement a WPF application (not XBAP), which could
automatically dock into the sidebar when moving
close the sidebar?

Best Regards
Steven