>>>James,
>>>
>>>ThisForm.DatasessionId = loFormA.DataSessionID
>>>
>>>or:
>>>
>>>SET DATASESSION TO (loFormA.DataSessionID)
>>
>>I've just discovered that if I do that, my form's grid loses RecordSource. Take care of that.
>
>That's because the recordsource no longer exists -- you are now in a different datasession. You want to set the datasession before the grid initializes, such as in the LOAD method.

I know, but it happens also when you call another form from your current form with NOSHOW, and set your datasession to the datasession of the called form - the grids in the calling form go south. One more thing to remember.