Sets the timer to expire at a specified time.
    On Alpha and Integrity server systems, this service accepts 64-
    bit addresses.
    Format
      SYS$SETIMR  [efn] ,daytim ,[astadr] ,[reqidt] ,[flags]
    C Prototype
      int sys$setimr  (unsigned int efn, struct _generic_64 *daytim,
                      void (*astadr)(__unknown_params), unsigned
                      __int64 reqidt, unsigned int flags);
Additional Information:
explode
extract