>I use a technique I call conditionally private data sessions. If a form (lineitems) is summoned from a parent form (invoice) the child form adopts the datasession of the parent form, conditionally opens and leaves open the line items cursor and saving is handled by the parent's datasession.
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>Lookup forms are not children in that sense. They save data to their tables.

This is not a child form -- it is the exact same form being called multiple times. Each time the user (in this case a VFP developer) would open a different file. The form is a menu editor -- you may want to have multiple menus open and copy-paste between them which is a reasonable request. The cursors are the same alias names; hence, a private datasession is required. So how to share between forms with private datasessions?