>It's necessary a TIB_Transaction component to start an explicit transaction
>or there is a way of do this only with a TIB_Connection component ?

Don't know if you can manage without explicitly declaring it, but I
certainly think you would want a TIB_Transaction component. It gives you
the control you are asking for.

>Other question: what is the diference between Commit and CommitRetaining
>methods ?

Commit closes your datasets, CommitRetaining keeps them open. You should
always make sure you occationally do a commit to keep the OAT advancing (it
won't with CommitRetaining).

Set