. Net winform Development notes (2) winform program running Structure

It's okay at noon. I will show you the pictures I drew when I graduated last year. I will introduce the winform application.ProgramThe running process and TCP application in winform. If you have basic information such as the windows message mechanism, you can understand these two images.

(1) program running structure of the winform Application

(2) Application of TCP communication protocol in winform Program

Familiar with the ins and outs of the entire program, programming will be very easy, not in the cloud.

Attached to the company's interview questions, used several times, found that the effect is not good, I do not know why

1. Briefly describe the differences between interfaces and abstract classes.

2. Briefly describe the differences between overload and override.

3. Understanding of OO ideas.

4. Briefly describe what the object "thread security" means.

5. How does one access controls across threads? Briefly describe the principle of this method.

6. Briefly describe the socket communication principle, and briefly describe how to handle the problem of incomplete data packets.

7. What are the most common design patterns in. Net winform programming?

8. Can I write a control similar to the ListBox function by myself? Briefly describe its principles.

9. Differences between forms and buttons in windows.

10. Briefly describe how to use C # (or VB) to import data from Excel to the database. This section describes how to import data from a database to a new Excel file using C # (or VB.

11. Two winform desktop applications a and B each have a main form that lists how program a closes program B.

12 scenario: In. Net winform programming, click "button1" with the mouse to bring up a MessageBox message prompt box.

Problem: describe the process of the above scenario from the message level of the Windows operating system.