This warning indicates that your code is not portable to C++. This is important for component writers who plan to distribute custom components.  

In the Delphi language, you can declare a base class with a private member, and a child class in the same unit can refer to the private member. In C++, this construction is not permitted. To fix it, change the child to refer to either a protected member of the base class or a protected member of the child class. 

Following is an example of code that would cause this error:

type
      TBase = class(…)
            private
        FFoo:Integer
            end;
      TChild=class(TBase)
            published
            property foo:Integer read FFoo write FFoo;
            end;