>I did a datasession class and put on my form class. But I wondered when I saw that as readonly. If I didn't understand wrong (Damn my poor English :( )from VFP Help that datasessions came from classes will readonly.
>Why my datasession class as readonly? Did I do a wrong or that's a property of datasession classes?

Do you mean the Data Environment Class? If so, I have had this discussion with MS here before:

DataEnvironment Subclass Thread #794205 Message #794205