VLF-ONE filters and command handlers provide simplified methods for handling asynchronous interactions with a server module. These methods encapsulate common activities in asynchronous interactions, for example they automatically handle messages and allow the screen content to be visibly changed while executing code.
Open the command handler produced by the SCRUD option (for example the XXX_XHOMESALE_SCRUD_Handler created in Create a Fully Functional Business Object), display the Source tab and note how operations are queued and then handled asychronously: