TWebbrowser 와 TCppWebbrowser 차이점

TWebbrowser is Delphi code(VCL).
TCppWebBrowser is C++ code(Non-VCL).

TWebBrowser is in ShDocVW.hpp/pas
TCppWebBrowser is in ShDocVW_OCX.H/cpp

TWebbrowser in fact is a wrapper over Microsoft's
Shell Doc Object and Control library (SHDOCVW.DLL)
http://beensoft.blogspot.com/2006/01/fooling-around-with-twebbrowser.html

TCppWebBrowser is a wrapper for the IE ActiveX.
http://www.borlandtalk.com/tcppwebbrowser-question-vt109099.html

How to post data using TCppWebBrowser in C++Builder
http://edn.embarcadero.com/article/27519

Link in there: MSDN library:
http://msdn.microsoft.com/library/default.asp?url=/workshop/browser/webbrowser/reference/Objects/WebBrowser.asp

That link is dead, but it might have pointed to

http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.aspx

See the many additional sections in the TOC at the left.