Event 19: After Init. Global Variables, Field Symbols, and So On 
This event occurs when a table maintenance dialog is called. The local memory of the function group is initialized after each call. Other activities can now be performed, for example,
initialize user global data or internal tables,
change the maintenance screen title bar
De-activate interface functions via the internal table EXCL_CUA_FUNCT
There are no standard routines for this event.