>best way to have trace of all actions saved in a table ?
What you need is called an "audit trail". FoxAudit is a commercial product that does that. If you want to make your own, see my explanations and sample code at
http://www.utmag.com/wconnect/wc.dll?9,7,10,1476HTH,
Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)