怎么写鼠标滚轮事件?

Question

我这样写为什么没有丝毫效果?        private void panel1_MouseWheel(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            this.label1.Text = "nihao";
            if (e.Delta < 0)
            {
                this.panel1.VerticalScroll.Value -= 1;
            }
            else
            {
                this.panel1.VerticalScroll.Value += 1;
            }
        }哪里错了啊,谢谢了.

Answer 1

//panel好像无法得到焦点,不过可以设置窗体的MouseWheel事件
this.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseWheel);