Conversion of Borland C++ 4.0 to Borland C++ Builder 4.0

I want to convert the Borland C++ 4.0 code to Borland C++ 5.02
so wanna know the changes if there is any in the coding of both the versions.

also want tips for Converting the project from Borland C++ 4.0 to Borland C++ Builder 4.0 i.e tips for changes to be made