Access to the API in the z/OS* environment uses the ASCLIENT started task. The caller must be APF authorized. The C header file is located in the z/OS Platform Services Samples Library member ASCAUTH. When link-editing applications that call the API, include the z/OS Platform Services Load Library in your SYSLIB concatenation. Calls to ASC_INIT() and ASC_INIT_EXT() must be made with the NULL parameter in place of the configuration file name, because ASCLIENT processes the platform configuration file for the z/OS environment.
For additional information about the z/OS platform, see the Platform Services Administration Guide for z/OS.