When ARSLOAD loads a document, it makes two calls of the DLL.
The arsuupdt DLL must be stored in the /usr/lpp/ars/V9R5M0/bin/exits directory and must have the APF extended attribute turned on. The arsuupdt DLL must have an exported entry point of UPDTEXIT. A sample to compile and link the ARSUUPDC is provided in ARSUUPDJ in the SARSINST data set.
The -E option must be specified to ARSLOAD before the exit will be called.
The exit can run in a threaded environment. The exit must be thread-safe.