c# 滑轮事件

       private void Form1_Load(object sender, EventArgs e)

        {

            this.MouseWheel += new MouseEventHandler(Form1_MouseWheel);

        }



        void Form1_MouseWheel(object sender, MouseEventArgs e)

        {           

            if (e.Delta > 0)

            {

                this.Text = "正在向上滚动滑轮";

            }

            else

            {

                this.Text = "正在向下滚动滑轮";             

            }

        }