[[Caral]]

Hola
Asi me funciona perfectamente:

Código Delphi [-]
procedure TForm1.Button1Click(Sender: TObject);
begin
  ShortDateFormat := '#dd/mm/yyyy#';
  ShortTimeFormat := '#hh:mm:ss#';
  adoquery1.Close;
  adoquery1.SQL.Text:='SELECT * FROM log WHERE destinatario =' +Quotedstr('Dioni') +
  ' AND leido = false AND fechaprog <= :dia'+
  ' AND horaprog <= :hora';
  adoquery1.Parameters[0].Value:= Date;
  adoquery1.Parameters[1].Value:= Time;
  adoquery1.Open;
  if adoquery1.IsEmpty then
  begin showmessage('Vacio');
  end
  else begin showmessage(adoquery1.FieldByName('mensaje').AsString); end
end;

Saludos