If the cursor is not yet initialized, MovePrevUnique is identical to 
            MoveLast()()(). Otherwise, move the cursor to the previous
            non-duplicate key in the database, and store the secondary key and
            primary key/data pair in Current. MovePrevUnique will
            return false if no non-duplicate key/data pairs exist after the 
            cursor position in the database. If key, or
            pkey, or data is
            partial DatabaseEntry, its 
            PartialLen bytes starting
            PartialOffset bytes from the beginning
            of the retrieved data record are returned as if they comprised the
            entire record. If any or all of the specified bytes do not exist
            in the record, MovePrevUnique is successful, and any existing bytes
            are returned.
            
    Namespace: 
   BerkeleyDBAssembly: libdb_dotnet53 (in libdb_dotnet53.dll) Version: 5.3.28.0
 Syntax
Syntax
| C# | 
|---|
| public bool MovePrevUnique( DatabaseEntry key, DatabaseEntry pkey, DatabaseEntry data ) | 
| Visual Basic (Declaration) | 
|---|
| Public Function MovePrevUnique ( _ key As DatabaseEntry, _ pkey As DatabaseEntry, _ data As DatabaseEntry _ ) As Boolean | 
| Visual C++ | 
|---|
| public: bool MovePrevUnique( DatabaseEntry^ key, DatabaseEntry^ pkey, DatabaseEntry^ data ) | 
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
 The retrieved key in secondary db
- pkey
- Type: BerkeleyDB..::.DatabaseEntry
 The key of the matching record in primary db
- data
- Type: BerkeleyDB..::.DatabaseEntry
 The data of the matching record in primary db
Return Value
True if the cursor was positioned successfully, false otherwise. Remarks
Remarks
            If positioning the cursor fails, Current will contain
            an empty KeyValuePair<(Of <(TKey, TValue>)>).
            





