Forms: How to redefine basic functionality (extending a plugin)

[fausastu]

Hello,

Is there any method / event that defines the elements of a form during construction, say include or exclude any section of it dynamically, based on incoming  data.

In other words is there a 'renderer' or 'construct' method who makes relations between dom elements and incoming fields, i can intercept an alter its behavoir? (maybe a beforeRender or afterInit event?).

Thxs in advance.

Fausto Astudillo.