If you have worked with the design time infrastructure you will know that there are parts of it that are poorly documented.
To complement MSDN help and internet searches you can try another source of information: patents.
Most big companies like to patent a lot of stuff so I stumbled upon this patent that has some good information about design time. The inventors of the patent are:
- Andrew Cheng-Min Lin
- Bulusu Krishna Mohan
- Nikhil Kothari
- Simon Calvert
Does any one sound familiar to you?
Anyway, nothing beats using reflector to figure out some of the more obscure interfaces. Unfortunately, it is also the slowest method.