1. A method for creating a graphical program which performs register accesses in a hardware device, wherein the method operates in a computer including a display screen and a user input device, the method comprising: displaying on the screen a register access node in the graphical program in response to user input; and configuring the register access node to access one or more registers of a hardware device; wherein, during execution of the graphical program, the register access node is operable to access the one or more registers of the hardware device.