delphi and its c++ counterpart, c++builder, are interoperable. they share many core components, notably the ide, vcl, and much of the runtime library. in addition, they can be used jointly in a project. for example, c++builder 6 and later can consume delphi source code and c++ in one project, while packages compiled with c++builder can be used from within delphi. in 2007, the products were released jointly as rad studio, a shared host for delphi and c++builder, which can be purchased with either or both.