Need units for delphi classes and forms

I am playing around with porting an application from Visual C++ and Delphi to GNU C++ and GNU GPC and I have a working GPC Compiler (based on a compile of the Tests in GPC). While I am no where near to having a working Makefile or truly compiled GNU GPC code for this application I have gotten as far as being able to determine that I need units for Delphi Classes and Forms. Does anyone know where I might locate these or get replacements that will work with GPC or is there some other using I need instead. Brian Keener bkeener@thesoftwaresource.com