将一个WinForm设置到桌面上

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            try
            {
                if (Environment.OSVersion.Version.Major < 6)
                {
                    base.SendToBack();

                    IntPtr hWndNewParent = User32.FindWindow("Progman", null);
                    User32.SetParent(base.Handle, hWndNewParent);
                }
                else
                {
                    User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE);
                }
            }
            catch (ApplicationException exx)
            {
                MessageBox.Show(this, exx.Message, "Pin to Desktop");
            }
        }

        private void Form1_Activated(object sender, EventArgs e)
        {
            if (Environment.OSVersion.Version.Major >= 6)
            {
                User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE);
            }
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            if (Environment.OSVersion.Version.Major >= 6)
            {
                User32.SetWindowPos(base.Handle, 1, 0, 0, 0, 0, User32.SE_SHUTDOWN_PRIVILEGE);
            }
        }
    }
    internal class User32
    {
        public const int SE_SHUTDOWN_PRIVILEGE = 0x13;

        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll")]
        public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

        [DllImport("user32.dll")]
        public static extern bool SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int X, int Y, int cx,
            int cy, uint uFlags);
    }
}