SEG_DISCARDABLE The segment may be discarded.
SEG_GETTABLE A shared segment that other
processes may access via the
DosGetSeg API.
SEG_GIVEABLE A shared segment that may be
given to other processes.
SEG_NONSHARED A nonshared, nondiscardable
segment.
SEG_SIZEABLE Specifies that a shared segment
may be reduced in size.