PROBLEM WITH SCREEN

Hello to all!

I have a problem of programming in CRM. I need to know the information that the user is introducing on screen from a 'Z' function. Till now, which I have obtained is to create an instance of the class of the screen and to call to his method READ. The problem I have it with the parameter ET_SCREEN_STRUCTURE, which I it do not know of what type declare, so they all those that I have tried till now give me dumb in execution. I have tried with a field-symbols type ANY, with crmt_bsp_scrstrucname... etc, but I have not obtained anything.

Or if not, does someone know how to read or to recover the information that the user is introducing in this moment on screen?

Thank you very much!