Creating IDE Interfaces using both C# and VB.net: http://www.codeproject.com/.../MagicDocking.asp
Source code and example a go-go!
For mere mortals, an IDE interface is similar to the visualstudio.net's view with dockable windows and enanched menus.

http://msdn.microsoft.com/.../default.aspx
How to use Serial Comm using C#

Next time!