(Alpha and I64 only.) The Reset Virtual Memory Zone routine frees
    all blocks of memory that were previously allocated from a zone
    in the 64-bit virtual address space.

    Format

      LIB$RESET_VM_ZONE_64  zone-id

1 - Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2 - Argument

 zone-id

    OpenVMS usage:identifier
    type:         quadword (unsigned)
    access:       read only
    mechanism:    by reference

    Zone identifier. The zone-id is the address of a quadword that
    contains the identifier of a zone created by a previous call to
    LIB$CREATE_VM_ZONE_64 or LIB$CREATE_USER_VM_ZONE_64.