Your initialization procedure should perform any initialization required by the exit, such as opening files and allocating storage. The initialization procedure-specific control block is coded as follows:
Dcl 1 Uex_ISA native based( null() ),
2 Uex_ISA_Length_fixed bin(31); /* storage(Uex_ISA) * /
The global control block syntax for the initialization procedure is discussed in the section Structure of global control blocks.
Upon completion of the initialization procedure, you should set the return/reason codes to the following: