InitializeComponent();
RegisterHotKey(Handle, 100, 2, Keys.Left); // 热键一:Control +光标左箭头...); // 热键一:Control +光标上箭头
RegisterHotKey(Handle, 400, 2, Keys.Down); // 热键一:Control +光标下箭头
....;...Control +光标左箭头,调用函数DecreseVolumnb();
case "200": AddVolumnb(); break; // 按下Control +光标右箭头...,调用函数AddVolumnb()
case "300":// 按下Control +光标上箭头,显示窗体
this.Visible = true;
break...;
case "400":// 按下Control +光标下箭头,隐藏窗体
this.Visible = false;
break;