How do I get the last 3 entries?
MS Access (pay attention to the spelling) uses SQL, so you can use:
SELECT TOP 3 * FROM [tablename] ORDER BY [columnName] DESC
if you have autonumber field as IID on your table then
select * from (select *, (select COUNT(0) from tableName where IID >= thisIsTempNameNotChange.IID) as INDEX from [tableName] thisIsTempNameNotChange) WHERE INDEX<=3