Hi,
Thank you for your reply and link.
I have read the message. If I understand correctly, that is not what I want. The message is discussing about adding layer to the framework. Instead, I have did it by adding I-Layer to all classes, and use vcxedit to "switch" control in composite class to my new I-layer class. It takes me half days to accomplish it.

Original

cTextBoxl
  |
  - cTextBox
  |
  - cLabel

New
icTextBox
|
- cTextBoxl
|
- icTextBox
| |
| - cTextBox
|
- icLabel
|
- cLabel



Ok, back to my question, what I am trying to do now is create a data environment, like what you see in generic.pjx. All data environment classes is subclass of environment. Whereas, environment is not a valid class unless qstart.app rename the classname and replace all it's subclasses with my project name.

I tried to use class designer to subclass environment but VFP return "illegal name" error.

Any ideas?

Thank you

I am not the most powerful man in this world.
I am not the worst man in this world either.
I just as same as all of you.
I still need to learn from my mistakes...