鼠标滚轮事件(C#)

using System;
using System.Windows.Forms;

namespace MouseWheelEventExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.MouseWheel += new MouseEventHandler(Form1_MouseWheel);
        }

        private void Form1_MouseWheel(object sender, MouseEventArgs e)
        {
            // 获取鼠标滚轮的滚动值
            int delta = e.Delta;

            // 根据滚动值执行相应操作
            if (delta > 0)
            {
                // 向上滚动
                Console.WriteLine("向上滚动");
            }
            else
            {
                // 向下滚动
                Console.WriteLine("向下滚动");
            }
        }
    }
}