# Java Client Customizing

## Query mode

| The Query mode is coded on client side. The server is contacted only if the user performs a count operation, or if the query gets executed. Therefore, it is not allowed to change the standard menu and button userexits used during query mode (namely wdh_upd_lis and wdh_cnt_lis and iwf_exi_edt). All action triggers however are fired as usual, so the business logic in these triggers should work as expected.