Write the user exit routine in C programming code. Use the CUSEREXIT parameter to call the user exit from a Windows DLL or UNIX shared object at a defined exit point within Oracle GoldenGate processing. Your user exit routine must be able to accept different events and information from the Extract and Replicat processes, process the information as desired, and return a response and information to the caller (the Oracle GoldenGate process that called it). For more information and syntax for the CUSEREXIT parameter, see "CUSEREXIT".