Favio-

If yo don't want to use buffering (IMO it would behoove you to spend the learning about it as soon as possible) then you could use an unbound textbox control so you have a change to look up the key.

Be aware, though, this will fail in multi-user environments.

>I don't have very clear the topic of the buffering yet , as you will have imagined.
>What I was trying to do, is to validate the key in the moment in that the user was entering the data (that is to say in the Valid Event of the fields) and if he finds a registration with that key, it doesn't allow him
>to continue (like in the old FoxProw 2.6), but the record it is already created, so it always returns me .t. (when I look for the key)..