# RTDS CBuilder Control System Components {#cbuilder}

RTDS's Component Builder creates user-defined components including graphical representation, data menus and real-time code.

Simple CBuilder control blocks can be executed in VILLASnode.
Every CBuilder component is represented as a node in the VILLAS concept.

The aforementioned real-time code is written in a dialect of the C programming language.
This enables easy cross-compilation of CBuilder code for VILLASnode.
The user only has to obey to the specifc structure of CBuilder code.
The file models/simple_circuit.c is an example for this structure.