Searches for a record which contains specified field values.
function FindKey(const KeyValues: array of System.TVarRec): Boolean;
Call the FindKey method to search for a specific record in a dataset. KeyValues holds a comma-delimited array of field values, that is called a key.
This function is provided for BDE compatibility only. It is recommended to use functions TMemDataSet.Locate and TMemDataSet.LocateEx for the record search.