42. A computer-implemented method for detecting differences between first and second graphical programs, wherein the method executes on a computer including a display, the method comprising: creating the first graphical program, wherein the first graphical program comprises first graphical code; creating the second graphical program, wherein the second graphical program comprises second graphical code; determining differences between said first graphical program and said second graphical program; and displaying an indication of said differences on the display; wherein said differences are used to evaluate at least one of the first graphical program and the second graphical program.
43. The method of claim 42, wherein the first graphical program comprises a first plurality of objects; wherein the second graphical program comprises a second plurality of objects; wherein said determining differences comprises determining differences between said first plurality of objects in said first graphical program and said second plurality of objects in said second graphical program.