C++ Package Source File (<package>.cpp)
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When you create a C++ package and save your package, RAD Studio asks you for a path to save your C++ project file. The file name that you choose for your C++ project file determines the name of your package. When you save your C++ project file, RAD Studio saves a C++ package source file in the same folder as your C++ project file, with <package>.cpp as file name.
Your C++ package source file contains the entry point for your package.