It is possible before i'm using UD insert extension to verify if the record i want to insert is not in the database yet ?

There is a feature with UltraDEV using their LOGIN Behaviors where it can crosscheck to see if a certain USERNAME is found. You may want to use the mock code from there and see how it checks for duplications and then apply that to what you're doing.

Aegis Kleais
New Media Web Developer
(DWMX : IIS5.1 : SQL2K : WXP : ASP[VB/JS])