Having Trouble Setting up Simple User-Defined Function

[stupomer]

Since I don't come from a programming background, some of the explanations in the help file are hard for me to understand at first, but once I get the general hang of things, I then can understand the more advanced functionality described in the help pages.
Maybe the community can write more "step-by-step" explanations as a primer for beginners like me (I geuss I am an advanced beginner now!), like you are already doing with your blog. Great job supplementing an already fantastic program..

Stuart