Integration of Pre-Defined Functionality and a Graphical Program in a Circuit

System and method for designing a circuit. At least one graphical program comprising a plurality of interconnected nodes that visually indicate functionality of the graphical program is selected in response to user input. At least one pre-defined hardware configuration program (HCP) is selected from a plurality of pre-defined HCPs in response to user input, where the selected at least one pre-defined HCP specifies a fixed functionality, including interface functionality for communicating with the at least one graphical program when implemented on the circuit. At least a portion of a netlist is generated based on the at least one graphical program and the at least one selected pre-defined HCP, where the netlist is usable to configure a circuit, wherein a first portion of the circuit implements the functionality of the graphical program and a second portion of the circuit implements the fixed functionality.