Carlos,
Sorry for the delay in getting back to you.

>Ranjit,
>Do you mean create a instance of this object each time i need it, or have it from the begining of the application ??.

It is best to create an instance of this object every time you need it. That is why I suggest that this class should be in your application specific VCX. Add the custom class only to the reqd form.

>In the first option: Does the object have the same datasession of the form ???

Yes. The question of a different datasession for the form and for this custom object on the form will NOT arise.

HTH
Ranjit.