[olbeup]

Hola Luis77,

No lo he probado mira a ver si te vale.

Código Delphi [-]
...
var
  BetweenStr: String;
begin
  BetweenStr := QuotedStr(FormatDateTime('dd/mm/yyyy hh:nn:ss.000', DateTimePicker1.DateTime));
  BetweenStr := BetweenStr + ' AND ' + QuotedStr(FormatDateTime('dd/mm/yyyy hh:nn:ss.999', DateTimePicker1.DateTime));
  with AdoQuery1 do
  begin
    Close;
    SQL.Add('SELECT *');
    SQL.Add('  FROM Clientes');
    SQL.Add('  WHERE FECHAALTA BETWEEN ' + BetweenStr);
    Open;
  end;
end;

Un saludo.