滚动条使用

代码说明：

滚动条使用--摄氏华氏温度 控件数组 用List设置光标形状 虽然写的简单,但我是学生,刚学没多久,编完这3个已经很吃力了-use of the rolling-- Fahrenheit temperature Celsius Control List set up an array with the cursor shape Although written in simple, but my students, learning not just how long the series finished it three have a very tough