Use the STAX service routine in a program to cause the system to recognize and schedule an attention exit that receives control when an attention interruption occurs. See Using the STAX service routine to handle attention interrupts.

Use the CLIST attention facility in a program that processes a CLIST with a CLIST attention exit. This facility allows a program to process the CLIST's attention exit when an attention interruption occurs. See Using the CLIST attention facility.