General Compatibility
A number of issues affect general compatibility between the various versions of Delphi, C++Builder, and Kylix. By making yourself aware of the support built into the compiler for writing compatible code, as well as some of the common gotchas, you'll be well on your way to targeting multiple versions from a single code base.
Which Version?
Although most Delphi code will compile for all versions of the compiler, in some instances language or VCL differences require that you write slightly differently to accomplish a given task for each product version. Occasionally, you might need to be able to compile for multiple versions of Delphi from one code base. For this purpose, each version of the Delphi compiler contains a VER
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