您链接的文章似乎是C ++，这也许可以解释为什么它对您没有太大帮助.

如果为MouseDown和MouseUp创建事件，则应具有矩形所需的两个角点.从那里开始，只需绘制表格即可.System.Drawing.*应该是您的第一站.以下链接了一些教程:

在WinForms中使用C#绘制图形 >

使用Winforms(***)绘制矩形

使用C#进行图形编程

I want to draw a rectangle on a form in C#. I read and found this article. Are there any samples or tutorials available ? The article was not very helpful.

The article you linked appears to be C++, which may explain why it didn't help you much.

If you create events for MouseDown and MouseUp, you should have the two corner points you need for a rectangle. From there, it's a matter of drawing on the form. System.Drawing.* should probably be your first stop. There are a couple of tutorials linked below:

Drawing with Graphics in WinForms using C#

Draw a rectangle using Winforms (***)

Graphics Programming using C#