]]> DtMmdbDlpGetPrevSectionIdlibrary call DtMmdbDlpGetPrevSectionIdobtains the object identifier of the previous section #include <DtMmdb.h> DtMmdbHandle* DtMmdbDlpGetPrevSectionId DtMmdbInfoRequest* request The DtMmdbDlpGetPrevSectionId function returns the object identifier of the previous section. You can use this function to traverse the TOC hierarchy in a depth-first fashion. Use the DtMmdbFreeHandleList function to release the memory when the object identifier is no longer needed. Table lookup is involved. request Specifies the bookcase in the bookcase descriptor field, as well as the id of the current section in the primary_oid field. If DtMmdbDlpGetPrevSectionId completes successfully, it returns a pointer to the object identifier for the previous section or DtMmdbGroundId, if there is no previous section. If it fails, it returns a NULL pointer. The following shows how a DtMmdbDlpGetPrevSectionId call might be coded. DtMmdbInfoRequest request; /* fill the request here */ DtMmdbHandle* x = DtMmdbDlpGetPrevSectionId(&request); if ( x == DtMMdbGroundId) { /* no previous section */ } else { if (x == 0) { /* bad request */ } else { /* make use of x */ } &cdeman.DtMmdbDlpGetNextSectionId;