Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

{How to stop the dbgrid control from auto-appending a new entry when you move 
down after the last record in a table. 
It creates a new blank line / record in the table. Can this be stopped?}

 {A: Add to your TTables's "BeforeInsert"  event the following line:}

 procedure TForm1.Tbable1BeforeInsert(DataSet: TDataSet);
 begin
   Abort;  {<<---this line}
 end;

 {A: It traps the down key and checks for end-of-file.}

 procedure TForm8.DBGrid1KeyDown(Sender: TObject; var Key: Word;
   Shift: TShiftState);
 begin
   if (Key = VK_DOWN) then
   begin
     TTable1.DisableControls;
     TTable1Next;
     if TTable1.EOF then
       Key := 0
     else
       TTable1.Prior;
     TTable1.EnableControls;
   end;
 end;