操作Windows系统菜单

 

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

namespace WindowSystemMenu
{
    /// <summary>
    /// 菜单类型
    /// </summary>
    public enum MenuItemFlag
    {
        /// <summary>
        /// 两列带分割竖线
        /// </summary>
        MF_BARBREAK = 0x20,
        /// <summary>
        /// 两列无分割竖线
        /// </summary>
        MF_BREAK = 0x40,
        /// <summary>
        /// 居于底部
        /// </summary>
        MF_BYCOMMAND = 0,
        /// <summary>
        /// 居于顶部
        /// </summary>
        MF_BYPOSITION = 0x400,
        /// <summary>
        /// 前面具有对号
        /// </summary>
        MF_CHECKED = 8,
        /// <summary>
        /// 残缺
        /// </summary>
        MF_DISABLED = 2,
        /// <summary>
        /// 变灰(无法响应事件)
        /// </summary>
        MF_GRAYED = 1,
        MF_POPUP = 0x10,
        /// <summary>
        /// 分割线
        /// </summary>
        MF_SEPARATOR = 0x800,
        MF_STRING = 0,
        /// <summary>
        /// 不选择(无对号)
        /// </summary>
        MF_UNCHECKED = 0
    }
    internal class NativeMethods
    {
        public const uint LastMenuID = uint.MaxValue;
        public static readonly IntPtr TRUE;
        public const int WM_SYSCOMMAND = 0x112;

        static NativeMethods()
        {
            TRUE = new IntPtr(1);
        }
        public NativeMethods()
        {
        }
        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool InsertMenu(IntPtr hMenu, uint wPosition, int wFlags, int wIDNewItem, string lpNewItem);
    }
    /// <summary>
    /// Windows系统菜单
    /// </summary>
    public class NativeWindowMenu : NativeWindow, IDisposable
    {
        private IntPtr _hMenu;
        private Dictionary<int, EventHandler> _menuClickEventList;
        private Form _owner;
        /// <summary>
        /// 构造方法
        /// </summary>
        /// <param name="owner"></param>
        public NativeWindowMenu(Form owner)
        {
            this._owner = owner;
            base.AssignHandle(owner.Handle);
            this.GetSystemMenu();
        }        
        /// <summary>
        /// 释放资源
        /// </summary>
        public void Dispose()
        {
            base.ReleaseHandle();
            this._owner = null;
            this._hMenu = IntPtr.Zero;
            if (this._menuClickEventList != null)
            {
                this._menuClickEventList.Clear();
                this._menuClickEventList = null;
            }

        }
        /// <summary>
        /// 根据窗口句柄获得IntPtr
        /// </summary>
        private void GetSystemMenu()
        {
            this._hMenu = NativeMethods.GetSystemMenu(base.Handle, false);
            if (this._hMenu == IntPtr.Zero)
                throw new Win32Exception("获取系统菜单失败。");
        }
        /// <summary>
        /// 插入靠上的分割线
        /// </summary>
        /// <returns></returns>
        public bool InertTopSeparator()
        {
            return this.InsertMenu(uint.MinValue, 0, MenuItemFlag.MF_SEPARATOR | MenuItemFlag.MF_BYPOSITION, "", null);
        }
        /// <summary>
        /// 插入靠下的分割线
        /// </summary>
        /// <returns></returns>
        public bool InertBottomSeparator()
        {
            return this.InsertMenu(uint.MaxValue, 0, MenuItemFlag.MF_SEPARATOR | MenuItemFlag.MF_BYPOSITION, "", null);
        }
        /// <summary>
        /// 插入靠上的菜单
        /// </summary>
        /// <param name="Id">标识(范围0, 0xf000)</param>
        /// <param name="Text">菜单显示文本</param>
        /// <param name="MenuClickEvent">菜单触发的事件</param>
        /// <returns></returns>
        public bool InsertTopMenu(int Id, string Text, EventHandler MenuClickEvent)
        {
            return this.InsertMenu(uint.MinValue, Id, MenuItemFlag.MF_BYPOSITION, Text, MenuClickEvent);
        }
        /// <summary>
        /// 插入靠下的菜单
        /// </summary>
        /// <param name="Id">标识(范围0, 0xf000)</param>
        /// <param name="Text">菜单显示文本</param>
        /// <param name="MenuClickEvent">菜单触发的事件</param>
        /// <returns></returns>
        public bool InsertBottomMenu(int Id, string Text, EventHandler MenuClickEvent)
        {
            return this.InsertMenu(uint.MaxValue, Id, MenuItemFlag.MF_BYPOSITION, Text, MenuClickEvent);
        }
        /// <summary>
        /// 插入系统菜单
        /// </summary>
        /// <param name="Position">位置(uint.MaxValue:靠下;uint.MinValue:靠上.)</param>
        /// <param name="Id">标识(范围0, 0xf000)</param>
        /// <param name="Mif">菜单类型</param>
        /// <param name="Text">菜单显示文本</param>
        /// <param name="MenuClickEvent">菜单触发的事件</param>
        /// <returns></returns>
        public bool InsertMenu(uint Position, int Id, MenuItemFlag Mif, string Text, EventHandler MenuClickEvent)
        {
            if (!(((Mif & MenuItemFlag.MF_SEPARATOR) == MenuItemFlag.MF_SEPARATOR) || this.ValidateID(Id)))
                throw new ArgumentOutOfRangeException("id", string.Format("菜单ID只能在{0}-{1}之间取值。", 0, 0xf000));
            bool flag = NativeMethods.InsertMenu(this._hMenu, Position, (int)Mif, Id, Text);
            if (flag && (MenuClickEvent != null))
                this.MenuClickEventList.Add(Id, MenuClickEvent);
            return flag;
        }
        /// <summary>
        /// 还原窗口句柄
        /// </summary>
        public void Revert()
        {
            NativeMethods.GetSystemMenu(base.Handle, true);
            this.Dispose();
        }
        /// <summary>
        /// 判断Id值是否符合要求
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        private bool ValidateID(int Id)
        {
            return ((Id < 0xf000) && (Id > 0));
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="m"></param>
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0x112)
            {
                this.OnWmSysCommand(ref m);
            }
            else
            {
                base.WndProc(ref m);
            }
        }
        private void OnWmSysCommand(ref Message m)
        {
            EventHandler handler;
            int key = m.WParam.ToInt32();
            if (this.MenuClickEventList.TryGetValue(key, out handler))
            {
                if (handler != null)
                {
                    handler(this, EventArgs.Empty);
                }
                m.Result = NativeMethods.TRUE;
            }
            else
            {
                base.WndProc(ref m);
            }
        }
        /// <summary>
        /// 菜单事件泛型
        /// </summary>
        protected Dictionary<int, EventHandler> MenuClickEventList
        {
            get
            {
                if (this._menuClickEventList == null)
                {
                    this._menuClickEventList = new Dictionary<int, EventHandler>(10);
                }
                return this._menuClickEventList;
            }
        }
    }
}

 

 

#region 重构菜单
        /// <summary>
        /// 引发CreateControl事件时绘制菜单
        /// </summary>
        protected override void OnCreateControl()
        {
            base.OnCreateControl();
            if (_NativeWindowMenu == null)
                _NativeWindowMenu = new NativeWindowMenu(this);
            _NativeWindowMenu.InertBottomSeparator();
            _NativeWindowMenu.InsertBottomMenu(1000, "关于(&A)...", delegate(object sender, EventArgs e) { this.About_Click(sender, e); });
            _NativeWindowMenu.InsertBottomMenu(1001, "作者博客(&B...)", delegate(object sender, EventArgs e) { this.AnthorBlog_Click(sender, e); });            
        }
        /// <summary>
        /// 句柄被销毁时释放NativeWindowMenu
        /// </summary>
        /// <param name="e"></param>
        protected override void OnHandleDestroyed(EventArgs e)
        {
            base.OnHandleDestroyed(e);
            if (_NativeWindowMenu != null)
            {
                _NativeWindowMenu.Dispose();
                _NativeWindowMenu = null;
            }
        }
        #endregion

 

 

源码下载