手机存储的IContextMenu Shell扩展

要实现“手机存储的IContextMenu Shell扩展”，可以按照以下步骤进行：

1. 创建一个新的C#类库项目。
2. 引用Shell32.dll和System.Windows.Forms命名空间。
3. 在项目中创建一个类，并实现IContextMenu接口。代码示例如下：

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Shell32;

namespace PhoneStorageContextMenu
{
    [ComVisible(true)]
    [Guid("Your-GUID-Here")]
    [ClassInterface(ClassInterfaceType.None)]
    public class PhoneStorageContextMenu : IContextMenu
    {
        public void QueryContextMenu(IntPtr hMenu, uint indexMenu, uint idCmdFirst, uint idCmdLast, uint uFlags)
        {
            // 在上下文菜单中添加自定义项
            Shell32.Shell shell = new Shell32.Shell();
            Folder folder = shell.NameSpace("Your-Phone-Storage-Path");
            FolderItem item = folder.ParseName("Your-File-Name");
            FolderItemVerbs verbs = item.Verbs();
            for (int i = 0; i < verbs.Count; i++)
            {
                MenuItem menuItem = new MenuItem(verbs.Item(i).Name);
                menuItem.Click += MenuItem_Click;
                ContextMenu menu = new ContextMenu(new MenuItem[] { menuItem });
                MenuItem[] menuItems = { menu.MenuItems[0] };
                menu.MergeMenu(hMenu, indexMenu, idCmdFirst + (uint)i, idCmdLast, uFlags);
            }
        }

        public void InvokeCommand(IntPtr pici)
        {
            // 处理菜单项的点击事件
            uint idCmd = (uint)(Marshal.ReadInt32(pici, 0) - 1);
            Shell32.Shell shell = new Shell32.Shell();
            Folder folder = shell.NameSpace("Your-Phone-Storage-Path");
            FolderItem item = folder.ParseName("Your-File-Name");
            FolderItemVerbs verbs = item.Verbs();
            if (idCmd >= 0 && idCmd < verbs.Count)
            {
                verbs.Item(idCmd).DoIt();
            }
        }

        public void GetCommandString(uint idCmd, uint uFlags, IntPtr pReserved, IntPtr pszName, uint cchMax)
        {
            // 获取菜单项的文字描述
            if (uFlags == (uint)Shell32.GCS.VERB)
            {
                Shell32.Shell shell = new Shell32.Shell();
                Folder folder = shell.NameSpace("Your-Phone-Storage-Path");
                FolderItem item = folder.ParseName("Your-File-Name");
                FolderItemVerbs verbs = item.Verbs();
                if (idCmd >= 0 && idCmd < verbs.Count)
                {
                    string verbName = verbs.Item(idCmd).Name;
                    if (cchMax < (uint)(verbName.Length + 1))
                    {
                        Marshal.ThrowExceptionForHR((int)Shell32.HRESULT.E_FAIL);
                    }
                    else
                    {
                        Marshal.GetNativeVariantForObject(verbName, pszName);
                    }
                }
            }
        }
    }
}

请注意，上述代码中的"Your-GUID-Here"应替换为您自己的GUID，"Your-Phone-Storage-Path"和"Your-File-Name"应替换为您的手机存储路径和文件名。

4. 在项目中添加一个名为"Registration.cs"的类，并添加以下代码：

using System;
using System.Runtime.InteropServices;

namespace PhoneStorageContextMenu
{
    public static class Registration
    {
        [DllImport("Shell32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);

        [ComRegisterFunction]
        public static void RegisterClass(Type t)
        {
            try
            {
                Shell32.Shell shell = new Shell32.Shell();
                string className = t.FullName;
                string subKey = $"CLSID\\{{{t.GUID.ToString().ToUpper()}}}\\InProcServer32";
                using (Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(subKey, true))
                {
                    key.SetValue(null, System.Environment.SystemDirectory + "\\mscoree.dll", Microsoft.Win32.RegistryValueKind.String);
                }

                subKey = $"CLSID\\{{{t.GUID.ToString().ToUpper()}}}\\Implemented Categories\\{{{Shell32.CLSID.ShellContextMenu}}}"; 
                using (Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.ClassesRoot.CreateSubKey(subKey))