I am sure this has been asked before but I missed it so I am asking again.

I am not clear on how data is handled when using Private vs Public data sessions.

Where can I get a clear explanation.

In particular what are the side affects of changing a forms datasession from public to private. The application does
use a few global variables, but the are thinks like userid, timeout for message boxes, etc (around 5 or 6).

The forms are in two broad catagories:

1. front end for reports where datasession is in the form not the report.

2. data entery forms which may call other forms.

The application was rewritten in VFP 5 (orignal was FPW 2.6)

It needs to be moved to VFP 6 and eventually 7.

Any pointer appreciated.