c#调用API显示隐藏状态栏

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WinApi
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("user32.dll", EntryPoint = "FindWindowA")]
        public static extern IntPtr FindWindowA(string lp1, string lp2);
        [DllImport("user32.dll", EntryPoint = "ShowWindow")]
        public static extern IntPtr ShowWindow(IntPtr hWnd, int _value);
        //获取任务栏
        IntPtr hTray = Form1.FindWindowA("Shell_TrayWnd", String.Empty);

        private void btnShow_Click(object sender, EventArgs e)
        {
            ShowWindow(hTray,1);
        }

        private void btnHide_Click(object sender, EventArgs e)
        {
          ShowWindow(hTray, 0);
        }
    }
}