NTSTATUS
RtlCreateAcl(
  IN  PACL Acl,
  IN  ULONG AclLength,
  IN  ULONG AclRevision
  );

Routine Description:

    This routine initializes an ACL data structure.  After initialization
    it is an ACL with no ACE (i.e., a deny all access type ACL)

Arguments:

    Acl - Supplies the buffer containing the ACL being initialized

    AclLength - Supplies the length of the ace buffer in bytes

    AclRevision - Supplies the revision for this Acl

Return Value:

    NTSTATUS - STATUS_SUCCESS if successful

               STATUS_BUFFER_TOO_SMALL if the AclLength is too small,

               STATUS_INVALID_PARAMETER if the revision is out of range