Set this variable to indicate to the runtime that the program makes calls to the CICS interface. When USE_CICS is set to 1 (on, true, yes), the runtime attempts to pass calls to functions that begin with the string "CICS" to the CICS interface. If the named routine does not exist, the runtime uses the normal search sequence to find a matching function. When USE_CICS is set to the default value of 0 (off, false, no), the runtime does not perform any special handling.