BAPIACEXTC is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Container for 'Customer Exit' Parameter" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_BAPIACEXTC TYPE BAPIACEXTC.
The BAPIACEXTC table consists of various fields, each holding specific information or linking keys about Container for 'Customer Exit' Parameter data available in SAP. These include FIELD2 (Character field with length 250), FIELD3 (Character field with length 250), FIELD4 (Character field with length 250)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .