help:zen cart code - what do "zen_" functions mean/do?

I cant understand the codes which begin with "zen_", such as zen_draw_form.
I was wonderig where I can find the explanations.

Thank you in advance!!!

Zen_ functions are ones created especially by the Zen Cart developers. Sometimes they mimic a standard PHP function with perhaps a custom twist, and sometimes they do something that no other PHP function has ever done.

There is no complete set of explanations in one place for zen_ functions; if you want to know what one does, you will have to look at its name and context, and perhaps read its code/file for more info.

dreamwheel a great way to find their "source" and hence what they do quickly is to use grep.

if you have a linux shell, from your site root, you can do a

grep -Ri 'function.*zen_draw_form' *

that will show you exactly which file the function called zen_draw_form is defined in, and hence what it does.

if you are using windows, you can go download a cool little program called wingrep that has a GUI interface to do the same thing.