Use a usercontrol in VSPackage

I'm just learning VSPackage making and already come across a problem.

I noticed that the toolwindow display is an xaml control but is it possible to use a normal winforms type UserControl as the toolwindow display?

I tried changing the content to:  Me.Content = New UserControl1 but that didn't work.

I found this: http://social.msdn.microsoft.com/Forums/en-US/vsx/thread/48330cde-8e52-467b-a80a-5deeb45d6c96

but it's in C# and although I tried to convert it it still doesnt work.

I've been searching for over an hour and still cant figure it out lol.  Please help.