The IMAPITable::QuerySortOrder method retrieves the current sort order for a table.
HRESULT QuerySortOrder(
LPSSortOrderSet FAR * lppSortCriteria
);
The IMAPITable::QuerySortOrder method retrieves the current sort order for a table. Sort orders are described with an SSortOrderSet structure.
If a call is made to your IMAPITable::SortTable method with an SSortOrderSet structure containing zero columns in the sort key, remove the current sort order and apply the default order, if there is one. In subsequent calls to QuerySortOrder, you can choose whether to return zero or more columns for the sort key. You can return more columns than are in the present view.
For more information about sorting, see Sorting and Categorization.
IMAPITable::SortTable, MAPIFreeBuffer, SSortOrderSet