procedure TForm1.StringGrid1SelectCell(Sender: TObject; ACol,
ARow: Integer; var CanSelect: Boolean);
var
s:string;
begin
s:=form1.StringGrid1.Cells[i,j];
if (s='') or (s='gf') then
canselect:=false
else
begin
canselect:=true;
i:=acol;
j:=arow;
end;
end;
procedure TForm1.FormShow(Sender: TObject);
begin
i:=0;
j:=0;
end;