[Vtigercrm-developers] How to develop an Extension Module? is there any tutorial?

[David]

Hi All,

According to the vtlib manual, it's very convenient to create an Entity 
module by using vtlib.

While, I need to use the vtlib to develop an extension module, and need 
to find a more detailed document or tutorial on Extension module.

Any one could tell me where to find it?

Thanks in advance.

David Zhu