Moves the cursor to a record specified by the current key.
Use GotoKey to move to a record specified by key values assigned with previous calls to SetKey or EditKey and actual search values indicated in the Fields property.
If GotoKey finds a matching record, it positions the cursor on the record and returns True. Otherwise the current cursor position remains unchanged, and GotoKey returns False.
Delphi 7 and prior has poor support for int64 values in variant type. This means that you'll be unable to use Locate() and similar methods with such fields. Lookup fields will not work proper too due to their dependence on Locate() method. Please update your IDE to BDS 2006 or don't use bigint (int8) and bigserial datatypes for keys and indexes if you need to use them in lookup fields.