Extending the language These topics cover extending Genero Business Development Language with other languages and external components. The Java interface The Java interface allows you to import Java classes and instantiate Java objects in your programs. C-Extensions With C-Extensions, you can bind your own C libraries in the runtime system, to call C function from the application code. User-defined front calls Front-ends can be extended with custom functions to access specific features. Web Components Implement specialized form elements with Web Components.