About This Appendix

This appendix provides information on how to write user exit programs in COBOL and Assembler languages.

User exit programs

CA IDMS VSAM Transparency supports the use of user exit programs. You can define two exits for each FMT:

A before exit is issued before CA IDMS VSAM Transparency processing begins or before the database is accessed. In a before exit, you can build the VSAM record layout from the CA IDMS/DB structure.
An after exit is issued after CA IDMS VSAM Transparency processing finishes or after the database is accessed. In an after exit, you can build the CA IDMS/DB structure from the VSAM record layout.

You can write the exits in either COBOL or Assembler.