CL_GUI_CFW: SET_NEW_OKCODE SAP-Description confuses?

Hi,

I am using the method:

cl_gui_cfw=>set_new_ok_code

to refresh the values within the Main-Dynpro, after the

user has changed some data within a CL_GUI_ALV_GRID-Grid Control.

It works fine. But when I was reading the Description

of the method within the class browser:

"Be Careful: This Sets a new Fcode in Event Handler for PAI"

I was a little bit confused.

Does anybody know what this hint really means?

i suppose it is just a hint, that SY-UCOMM will be

processed in PAI. Thats all and that's what i want. But why should I be careful?

Thanks a lot

Michael