I think the concepts and knowledge of learning VB and so on.
First of all, you must grasp the overall:
It turned out that the API is very mysterious, and it can be made.
Today, I suddenly saw the introduction of the API, actually the function or process outside VB.
It is the same as the most common process or function when it is applied.
So, after learning something, first grasp it, know the main content of each chapter, which is a difficult point, which is the focus.
The operation of the database in VB should be a key point.
The difficulty should be in the class and model.
