切换桌面的自动安排

问题描述

我一直试图在Windows Vista上以编程方式切换桌面图标的自动排列功能，但是我无法理解为什么它没有任何作用.我不知道是否可以在XP上运行，但我没有对其进行测试.有人可以看一下代码，然后尝试找出它的问题吗:

I've been trying to toggle desktop icon's autoarrange feature programatically on the Windows Vista, but I fail to understand why it's not having any effect. I don't know whether is working on XP, i didn't test it. Can someone please take a look at the code and try to find what is wrong with it:

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private const int GWL_STYLE = (-16);
        private const int LVS_AUTOARRANGE = 0x100;
        private const int WM_COMMAND = 0x111;
        private const int IDM_TOGGLEAUTOARRANGE = 0x7041;
        private const int IDM_TOGGLEAUTOALIGN = 0x7054;
        public const string nullS = null;

        [DllImport("user32", EntryPoint = "GetWindowLongA", CharSet = CharSet.Ansi,
       SetLastError = true, ExactSpelling = true)]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32", EntryPoint = "FindWindowA", CharSet = CharSet.Ansi,
            SetLastError = true, ExactSpelling = true)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        [DllImport("user32", EntryPoint = "FindWindowExA", CharSet = CharSet.Ansi,
            SetLastError = true, ExactSpelling = true)]
        private static extern IntPtr FindWindowEx(IntPtr hWndParent,
            int hWndChildAfter, string lpClassName, string lpWindowName);
        [DllImport("user32", CharSet = CharSet.Auto, ExactSpelling = true)]
        private static extern IntPtr GetParent(IntPtr hWnd);
        [DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi,
            SetLastError = true, ExactSpelling = true)]
        private static extern int SendMessage(IntPtr hWnd, int wMsg, int wParam,
            int lParam);


        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            IntPtr handleDesktop = default(IntPtr);
            int styleHandle = 0;

            // Get a handle to the desktop listview 
            handleDesktop = GetSysLVHwnd();

            if (handleDesktop.Equals(IntPtr.Zero))
            {
                return;
            }

            // Get the style of the listview 
            styleHandle = GetWindowLong(handleDesktop, GWL_STYLE);

            // If the list view is set for auto-arrange turn it off 
            if ((styleHandle & LVS_AUTOARRANGE) == LVS_AUTOARRANGE)
            {
                IntPtr handleParent = default(IntPtr);
                handleParent = GetParent(handleDesktop);
                int dd = SendMessage(handleParent, WM_COMMAND, IDM_TOGGLEAUTOARRANGE, 0);
                //MessageBox.Show(dd.ToString());
            }

        }


        private IntPtr GetSysLVHwnd()
        {
            IntPtr lHandle = default(IntPtr);
            lHandle = FindWindow("Progman", nullS);
            lHandle = FindWindowEx(lHandle, 0, "SHELLDLL_defVIEW", nullS);
            return FindWindowEx(lHandle, 0, "SysListView32", nullS);
        }


    }
}

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