1. 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: determining differences between said first graphical program and said second graphical program, wherein said first graphical program and said second gaphical program each comprise graphical code; 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.
3. The method of claim 1, wherein said first and second graphical programs each include a user interface panel which displays data.