Since this feature has been dropped from v2.0 here are some places that will help

Tutorials:

• http://www.thecodeproject.com/KB/game/XNA_And_Beyond.aspx
• http://www.codeproject.com/game/XNA_and_WinForms.asp
• http://www.ziggyware.com/readarticle.php?article_id=82
• http://blogs.msdn.com/rogerboesch/archive/2007/01/20/tipp-xna-in-eigene-applikationen-einbinden-winforms.aspx (German)
• http://www.nuclex.org/news/2007/05/14/xna-windows-forms-usercontrol
• http://www.codeproject.com/csharp/XnaFormHost.asp
• http://blogs.msdn.com/shawnhar/archive/2007/01/23/using-xna-with-winforms.aspx

Forum posts:

• http://forums.xna.com/thread/34036.aspx