COLLAPSIABLESPLITTER & CollapsiblePane, you can make a warm body for watching MSDNTV, huh, :)
Since I have been using VC , MFC, C # only has a little contact, so it is very difficult. These two controls are quite simple. The main job is to overload a few message functions, as well as some EventHandler. However, after reading, I really feel that C # is really convenient to make user controls, interface programming, more than MFC. Especially the code of drawing controls, with the MFC Device Context and the Graphics with C #, it can't be better. Unfortunately, the company is impossible to turn to DotNet during a considerable period of time.
Don't make a pleasure, start studying MSDNTV, 嘿嘿 ^ _ ^