>I'm trying to understand exactly how a form handles a Default Data Session. If Form A has a private data session and it calls Form B which is set to Default DataSession, does Form B use Form A's datasession, or another one entirely? If multiple forms are using Default Data Sessions, are they all using the same Data Session or each one depends on where it was called from?
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>Thanks.

Elyse,
You understand it better than you think.

Setting the Datasession property to 1 - Default tells the form not to create a new datasession when it launches and use the datasession currently active. What a lot of people misunderstand (and I used to be one of them) is that Default Datasession is not datasession #1 (the datasession associated with _Screen).

In answer to your question, multiple forms configured to use the Default datasession can pariticipate in different datasessions. It all depends on how they were launched.