DosGiveSeg

#define INCL_DOSMEMMGR

USHORT  rc = DosGiveSeg(CallerSegSelector, ProcessID, RecipientSegSelector);

SEL           CallerSegSelector;    /* Caller's segment selector */
PID           ProcessID;            /* Process ID of recipient */
PSEL          RecipientSegSelector; /* Recipient's segment selector
                                        (returned) */

USHORT        rc;                   /* return code */