VMS Help RTL Routines, LIB$, LIB$RESET_VM_ZONE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Reset Virtual Memory Zone routine frees all blocks of memory
    that were previously allocated from a zone in the 32-bit virtual
    address space.

    Format

      LIB$RESET_VM_ZONE  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:         longword (unsigned)
    access:       read only
    mechanism:    by reference

    Zone identifier. The zone-id is the address of a longword that
    contains the identifier of a zone created by a previous call to
    LIB$CREATE_VM_ZONE or LIB$CREATE_USER_VM_ZONE.