LastFoundRow
Gets row index found by FindText and FindTextByRow methods. If there is no row found, value is -1.property LastFoundRow: Integer read FLastFoundRow;
Example:
if NextGrid1.FindText(NxTextColumn1.Index, Edit1.Text, [soCaseInsensitive]) then
begin
ShowMessage('Index of row: ' + IntToStr(NextGrid1.LastFoundRow));
end;