1. A computer-accessible memory medium that stores program instructions executable by a processor to perform: displaying a node in a graphical program; receiving first user input invoking display of a plurality of functions for the node; displaying the plurality of functions for the node in response to the first user input; receiving second user input selecting a function from the plurality of functions; determining graphical program code based on the second user input, wherein the determined graphical program code comprises a graphical representation of an implementation of the selected function, and wherein the determined graphical program code is executable to provide functionality in accordance with the selected function; associating the determined graphical program code with the node, wherein, when the node in the graphical program executes, the determined graphical program code executes to provide the functionality in accordance with the selected function.