The OSREQ macro is the application program interface to OAM and is located in the SYS1.MACLIB macro library. IBM High Level Assembler (HLASM) is required to assemble this macro.

See Performance considerations and object data reblocking for performance considerations to take into account when writing your application program that interfaces with the OSREQ macro.

See Using the CBRUXSAE installation exit for information on and a sample of the CBRUXSAE security authorization installation exit that is used at the OSREQ macro level.