uso de lookup

[odrack]

Tank for you help!, I do with the next code:

first. In SQL I add:
select *
from tabla
where indvalor=:indvalor

second:

In Click Button1 I add

form3.Query1.Close;
form3.Query1.Params[0].Value:=dbedit1.Text;
form3.Query1.Open;

And that's all, with this code I can select the fiel where indvalor is the same like dbedit.text

Tank's for your help!