LINK explanation and syntax...

* Links to a lower level program.
* Program is not terminated.
* Data passed to the lower program through the commarea area option is passed by reference. i.e any
modification done in the subroutine is reflected in the main program.
* Handle conditions, Attention Identifiers and abends are not transferred with the execution of the CICS command and any in effect are restored when control is returned to the calling program.
syntax:

EXEC CICS LINK
                     program ( program name )
                     Commarea ( Data - area )
                     Length ( Data value )
END-EXEC.