A These are files used to compile zlib under Borland C++ Builder 3.   H zlib.bpg is the main project group that can be loaded in the BCB IDE and loads all other *.bpr projects  M zlib.bpr is a project used to create a static zlib.lib library with C calling  convention for functions.   J zlib32.bpr creates a zlib32.dll dynamic link library with Windows standard calling convention.   H d_zlib.bpr creates a set of .obj files with register calling convention.I These files are used by zlib.pas to create a Delphi unit containing zlib. > The d_zlib.lib file generated isn't useful and can be deleted.  C zlib.cpp, zlib32.cpp and d_zlib.cpp are used by the above projects.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               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