>I am using a private datasession, in a form. How should I go about it?

If you are instatntiating your DataEnvironment by code (in the Load event)
then you can SET DELTETED (and all the rest of the session dependent SETs) in the LOAD event
otherwise the BeforeOpenTables is probably even better
btw, you may want to create a single object with all the SETs and instantiate that, this way you'll only have one place to change if you want to make any changes to your defaults

Arnon