The USEREXIT option specifies a user-defined exit that will be given control to manage an event.
(1) (2) >>-USEREXIT--+-Yes-+--module_name------DLL_name-----------------> '-No--' (3) >--function----------------------------------------------------><
This is the name of a shared library containing the exit. The module name can be either a fully qualified path name or just the module name itself. If it is just the module name, it is loaded from the current directory.
userexit yes dllname.dll dllmodulename
userexit yes fevent.exit