 is freed. If this flag is <EM>
off</EM>
, the memory manager may move the block when it is unlocked. If it is <EM>
on</EM>
, the block may not be locked. This flag <EM>
cannot</EM>
 be changed after the block has been allocated.</DD>
<DT>
HF_SHARABLE</DT><DD>
The block may be locked by geodes other than the owner. This flag can be changed with <CODE>
MemModifyFlags()</CODE>
.</DD>
<DT>
HF_DISCARDABLE</DT><DD>
If the block is unlocked and space is needed, the memory manager may discard it. This flag can be 