>>Is there any way to subclass the dataenvironment class and force
>>every new form to use this new class.
>
>You can use the VFP6 SP3 Session class and add that to the form at runtime. What do you plan to do with it? You could also put SET commands and other things into the Load() event of your form if that helps.

Why would you need the session class? Even if you don't use the default dataenvironment, VFP forms can have their own Datasessions.