Asp.net custom server controls

Recently, the company has arranged to create a custom reusable control, which has been engaged in C/S. Suddenly, I am not used to B/S, the Web idea that has been put on hold for two years has become obsolete, so it is time to make up for it.
Msdn:

Walkthrough: Develop and use custom server controls
Http://msdn.microsoft.com/zh-cn/library/yhzc935f.aspx

Walkthrough: Create a basic control designer for Web server controls
Http://msdn.microsoft.com/zh-cn/library/12yydcke.aspx

Overview of ASP. NET control designer
Http://msdn.microsoft.com/zh-cn/library/wxh45wzs.aspx

Several articles are long, and based on versions 2.0 and later, the company uses 1.1, and there is no way to read these articles.

After reading the above, I have a rough understanding of the production of server controls. Combined with my understanding of 1.1, I believe this can be done. Continue tomorrow...

PS: I found that my temper has been much less recently, and I don't know if my life is getting better. Today, I finally bought my long-awaited goldfish and exercised my salary.