最近为了做公众号号推广，吸粉，然后加了几百个QQ群，感觉QQ群的群发效果还是不错的，一天能捞到100个粉丝左右，好的时候也有200个，少的时候几十个，但是由于太多的群了，手工一个个点击开来群发，几百个群，要花费大量的时间，所以想到了QQ群发工具，然后就在百度上搜索，最后发现网上很多QQ群发器根本用不了，本来想买一个的，因为太垃圾了，就不买了，而自己又是个程序员，干脆花点时间自己编写一个工具，经过两天奋战，终于把这个工具写好了，经测试，感觉还挺稳定的，这样我就可以解放双手了，现在我要把这编写的代码分享给大家。

新建项目AssistLib

新建相关实体类

AssistEventArgs.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace AssistLib.Models
{
    public class SendMessageEventArgs : EventArgs
    {
        public object State { get; set; }
    }
}

Group.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace AssistLib.Models
{
    public class Group
    {
        /// <summary>
        /// 窗口句柄
        /// </summary>
        public IntPtr Hwnd { get; set; }

        /// <summary>
        /// 窗口类名
        /// </summary>

        public string ClassName { get; set; }

        /// <summary>
        /// 群名称
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// 是否发送
        /// </summary>
        public bool IsSend { get; set; }
    }
}

Settings.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AssistLib.Models
{
    /// <summary>
    /// 设置
    /// </summary>
    public class Settings
    {
        /// <summary>
        /// 发送内容
        /// </summary>
        public string Content { get; set; }

        /// <summary>
        /// 图片路径
        /// </summary>
        public string ImagePath { get; set; }

        /// <summary>
        /// 是否随机待问候语
        /// </summary>
        public bool IsGreeting { get; set; }

        /// <summary>
        /// 是否重复循环发送
        /// </summary>
        public bool IsReply { get; set; }

        /// <summary>
        /// 如果重复循环发送，隔多久循环（分钟）
        /// </summary>
        public int ReplyInterval { get; set; }

        /// <summary>
        /// 发送速度
        /// </summary>
        public Speed SendSpeed { get; set; }

        /// <summary>
        /// 发送键类型
        /// </summary>
        public SendKeyType KeyType { get; set; }
    }

    /// <summary>
    /// 发送速度
    /// </summary>
    public enum Speed : byte
    { 
        /// <summary>
        /// 300毫秒
        /// </summary>
        Fast,

        /// <summary>
        /// 1000毫秒
        /// </summary>
        Middle,

        /// <summary>
        /// 3000毫秒
        /// </summary>
        Slow
    }

    /// <summary>
    /// QQ发送键类型
    /// </summary>
    public enum SendKeyType : byte
    {
        Enter,
        CtrlEnter
    }
}

新建群发器类Assist.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using AssistLib.Models;
using Newtonsoft.Json;

namespace AssistLib
{

    public class Assist
    {
        /// <summary>
        /// 取消任务告知源
        /// </summary>
        static CancellationTokenSource cts = new CancellationTokenSource();
        static ManualResetEvent resetEvent = new ManualResetEvent(true);
        static ManualResetEvent resetEvent2 = new ManualResetEvent(false);
        static Task task = null;

        public Assist()
        {
            //初始化数据
            InitData();
        }

        #region 属性

        /// <summary>
        /// 群列表
        /// </summary>
        public List<Group> GroupList = new List<Group>();

        /// <summary>
        /// 问候语列表
        /// </summary>
        public List<string> GreetingsList = new List<string>();

        /// <summary>
        /// 群发间隔时间（毫秒）
        /// </summary>
        public int Interval { get; set; }

        public Settings SendSettings { get; set; }

        #endregion

        #region 方法

        /// <summary>
        /// 取消
        /// </summary>
        public static void TaskCancel()
        {
            cts.Cancel();

            //终止线程阻塞
            resetEvent.Set();
            resetEvent2.Set();
           
        }

        /// <summary>
        /// 是否已经取消
        /// </summary>
        /// <returns></returns>
        public static bool TaskIsCancellationRequested()
        {
            return cts.IsCancellationRequested;
        }

        /// <summary>
        /// 暂停
        /// </summary>
        public static void TaskReset()
        {
            resetEvent.Reset();

            //线程阻塞启用
            resetEvent2.Reset();
        }

        /// <summary>
        /// 继续
        /// </summary>
        public static void TaskSet()
        {
            resetEvent.Set();

            //线程阻塞启用
            resetEvent2.Reset();
        }

        public Task GetTask()
        {
            return task;
        }

        /// <summary>
        /// 发送内容
        /// </summary>
        /// <param name="hwnd"></param>
        private void SendMessage(IntPtr hwnd)
        {
            WinAPI.ShowWindow(hwnd, 9);
            WinAPI.SetActiveWindow(hwnd);
            WinAPI.SetForegroundWindow(hwnd);
            WinAPI.SetFocus(hwnd);
            SendKeys.SendWait("^v");

            if (SendSettings.KeyType == SendKeyType.Enter)
            {
                SendKeys.SendWait("{ENTER}");
            }
            else
            {
                SendKeys.SendWait("^{ENTER}");
            }

        }

        /// <summary>
        /// 将内容复制到粘贴板上
        /// </summary>
        private void CopyToClipboard()
        {

            var message = "";

            //图片
            if (File.Exists(SendSettings.ImagePath))
            {
                message += string.Format(@"  <IMG src=""file:///{0}"" > <br /> ", SendSettings.ImagePath);
            }

            //内容
            if (!string.IsNullOrWhiteSpace(SendSettings.Content))
            {
                message += SendSettings.Content + "  <br> ";
            }

            //问候语
            if (SendSettings.IsGreeting && GreetingsList.Count > 0)
            {
                var random = new Random();
                var index = random.Next(0, GreetingsList.Count);
                message += GreetingsList[index] + "  <br> ";
            }
            
            Console.WriteLine(message);

            //设置粘贴板内容
            if (!string.IsNullOrWhiteSpace(message))
            {
                if (File.Exists(SendSettings.ImagePath))
                {
                    ClipboardHelper.CopyToClipboard(message, "");
                }
                else
                {
                    message = message.Replace("<br>", "\n");
                    Clipboard.SetText(message, TextDataFormat.UnicodeText);
                }
            }
        }


        /// <summary>
        /// 发送消息
        /// </summary>
        public void SendMessage()
        {
            cts = new CancellationTokenSource();
            resetEvent = new ManualResetEvent(true);
            resetEvent2 = new ManualResetEvent(false);

            Logger logger = new Logger();
            var logMsg = "";

            task = Task.Factory.StartNew(() =>
            {
                var tcs = new TaskCompletionSource<object>();
                var thread = new Thread(() =>
                {
                    try
                    {
                        logMsg = SendMessage(logger, logMsg);
                        tcs.SetResult(new object());
                    }
                    catch (Exception e)
                    {
                        tcs.SetException(e);
                    }
                });
                thread.SetApartmentState(ApartmentState.STA);
                thread.Start();
                thread.Join();
            }, cts.Token);

            
        }

        private string SendMessage(Logger logger, string logMsg)
        {
            #region 业务逻辑

            var arg = new SendMessageEventArgs();

            //取消线程
            while (true)
            {
                foreach (var g in GroupList)
                {
                    //取消线程
                    if (cts.IsCancellationRequested)
                    {
                        logMsg = string.Format("【发送取消】{0}", g.Name);
                        logger.Write(logMsg);

                        if (OnSendFinished != null)
                        {
                            arg.State = logMsg;
                            OnSendFinished(g, arg);
                        }

                        break;
                    }

                    //阻塞线程
                    resetEvent.WaitOne();

                    if (!g.IsSend) continue;
                    if (!WinAPI.IsWindowVisible(g.Hwnd))
                    {
                        logMsg = string.Format("{0}【发送失败，可能已关闭】", g.Name);
                        logger.Write(logMsg);

                        if (OnSendFaild != null)
                        {
                            arg.State = logMsg;
                            OnSendFaild(g, arg);
                        }

                        continue;
                    }

                    CopyToClipboard();
                    SendMessage(g.Hwnd);

                    logMsg = string.Format("【发送成功】{0}", g.Name);
                    logger.Write(logMsg);

                    if (OnSending != null)
                    {
                        arg.State = logMsg;
                        OnSending(g, arg);
                    }

                    resetEvent2.WaitOne(this.Interval);
                }

                //取消线程
                if (cts.IsCancellationRequested)
                {
                    logMsg = string.Format("【发送取消，群循环取消发送】");
                    logger.Write(logMsg);

                    if (OnSendFinished != null)
                    {
                        arg.State = logMsg;
                        OnSendFinished(null, arg);
                    }

                    break;
                }

                //不循环，跳出发送
                if (!SendSettings.IsReply)
                {
                    logMsg = string.Format("【发送完毕！】");
                    logger.Write(logMsg);

                    if (OnSendFinished != null)
                    {
                        arg.State = logMsg;
                        OnSendFinished(null, arg);
                    }

                    break;
                }
                else
                {
                    resetEvent2.WaitOne(SendSettings.ReplyInterval * 60 * 1000);
                }
            }

            #endregion
            return logMsg;
        }

        /// <summary>
        /// 初始化数据
        /// </summary>
        public void InitData()
        {
            var setting = AssistTool.GetSettings();
            if (setting == null) return;

            SendSettings = setting;
            this.GreetingsList = AssistTool.GetGreetings();

            switch (setting.SendSpeed)
            {
                case Speed.Middle:
                    this.Interval = 1000;//
                    break;
                case Speed.Slow:
                    this.Interval = 3000;//
                    break;
                default:
                    this.Interval = 300;//
                    break;
            }

            if (!File.Exists(SendSettings.ImagePath))
            {
                SendSettings.ImagePath = string.Empty;
            }

            this.GroupList = AssistTool.GetGroupList();
        }

        #endregion

        public event SendEventHandler OnSending;
        public event SendEventHandler OnSendFinished;
        public event SendEventHandler OnSendFaild;

        public delegate void SendEventHandler(Group sender, SendMessageEventArgs e);
    }
}

新建群发器工具类AssistTool.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using AssistLib.Models;
using Newtonsoft.Json;

namespace AssistLib
{
    public class AssistTool
    {
        private static List<Group> GroupList = new List<Group>();

        /// <summary>
        /// 保存参数
        /// </summary>
        public static void SaveSettings(Settings settings)
        {
            string path = Directory.GetCurrentDirectory();
            string setPath = Path.Combine(path, "Settings.json");

            if (!File.Exists(setPath))
            {
                File.Create(setPath).Close();
            }

            using (StreamWriter writer = new StreamWriter(setPath, false, Encoding.UTF8))
            {
                var json = JsonConvert.SerializeObject(settings);
                writer.Write(json);
            }
        }

        /// <summary>
        /// 获取设置参数
        /// </summary>
        /// <returns></returns>
        public static Settings GetSettings()
        {
            Settings set = new Settings();
            string path = Directory.GetCurrentDirectory();
            string setPath = Path.Combine(path, "Settings.json");

            if (!File.Exists(setPath))
            {
                return null;
            }

            using (StreamReader sr = new StreamReader(setPath))
            {
                var json = sr.ReadToEnd();
                set = JsonConvert.DeserializeObject<Settings>(json);
            }

            if (set.ReplyInterval <= 0)
            {
                set.ReplyInterval = 1;
            }
            else if (set.ReplyInterval > 600)
            {
                set.ReplyInterval = 600;
            }

            return set;
        }

        /// <summary>
        /// 保存问候语
        /// </summary>
        public static void SaveGreetings(string content)
        {
            string path = Directory.GetCurrentDirectory();
            string setPath = Path.Combine(path, "greetings.txt");

            if (!File.Exists(setPath))
            {
                File.Create(setPath).Close();
            }

            using (StreamWriter writer = new StreamWriter(setPath, false, Encoding.UTF8))
            {
                writer.Write(content);
            }
        }

        /// <summary>
        /// 获取问候语
        /// </summary>
        /// <returns></returns>
        public static List<string> GetGreetings()
        {
            List<string> list = new List<string>();
            string path = Directory.GetCurrentDirectory();
            string setPath = Path.Combine(path, "greetings.txt");

            if (!File.Exists(setPath))
            {
                return list;
            }

            using (StreamReader sr = new StreamReader(setPath))
            {
                var text = "";
                while (!string.IsNullOrWhiteSpace(text = sr.ReadLine()))
                {
                    list.Add(text);
                }
            }

            return list;
        }

        /// <summary>
        /// 读取问候语的内容
        /// </summary>
        /// <returns></returns>
        public static string GetGreetingsText()
        {
            var content = "";
            string path = Directory.GetCurrentDirectory();
            string setPath = Path.Combine(path, "greetings.txt");

            if (!File.Exists(setPath))
            {
                return string.Empty;
            }

            using (StreamReader sr = new StreamReader(setPath))
            {
                content = sr.ReadToEnd();
               
            }

            return content;
        }

        /// <summary>
        /// 枚举窗口
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="lParam"></param>
        /// <returns></returns>
        private static bool WindCallback(IntPtr hwnd, int lParam)
        {
            StringBuilder classname = new StringBuilder(256);
            WinAPI.GetClassName(hwnd, classname, classname.Capacity);
            string leiname = classname.ToString();
            IntPtr pHwnd = WinAPI.GetParent(hwnd);

            if (pHwnd == IntPtr.Zero && WinAPI.IsWindowVisible(hwnd) == true && leiname == "TXGuiFoundation")
            {
                StringBuilder sbWindowText = new StringBuilder(256);
                StringBuilder sbClassName = new StringBuilder(256);

                WinAPI.GetWindowText(hwnd, sbWindowText, sbWindowText.Capacity);
                WinAPI.GetClassName(hwnd, sbClassName, sbClassName.Capacity);

                if (sbWindowText.Length > 0)
                {
                    var g = new Group()
                    {
                        Hwnd = hwnd,
                        Name = sbWindowText.ToString(),
                        ClassName = sbClassName.ToString(),
                        IsSend = true
                    };

                    GroupList.Add(g);
                }
            }

            return true;
        }

        /// <summary>
        /// 获取群窗口
        /// </summary>
        public static List<Group> GetGroupList()
        {
            if (GroupList.Count > 0)
            {
                return GroupList;
            }
            else
            {
                WinAPI.EnumWindowsCallBack callback = new WinAPI.EnumWindowsCallBack(WindCallback);
                WinAPI.EnumWindows(callback, 0);
            }

            return GroupList;
        }

        /// <summary>
        /// 刷新群列表
        /// </summary>
        /// <returns></returns>
        public static List<Group> ReloadGroupList()
        {
            GroupList.Clear();

            WinAPI.EnumWindowsCallBack callback = new WinAPI.EnumWindowsCallBack(WindCallback);
            WinAPI.EnumWindows(callback, 0);

            return GroupList;
        }

        /// <summary>
        /// 绘图，广告联系方式
        /// </summary>
        public static void CreateContactPic(string imagePath)
        {
            if (!File.Exists(imagePath)) return;

            string path = Directory.GetCurrentDirectory();
            string destPath = Path.Combine(path, "send.jpg");
            Image imageDest = Image.FromFile(imagePath);

            //图片太小
            if (imageDest.Height < 32) return;

            using (Graphics g = Graphics.FromImage(imageDest))
            {
                Font font = new System.Drawing.Font("Arial", 9, FontStyle.Regular);
                //g.Clear(Color.White);

                Image imageWater = new Bitmap(220, 32);

                using (Graphics gWater = Graphics.FromImage(imageWater))
                {
                    gWater.Clear(Color.Gray);

                    Brush brush1 = new SolidBrush(Color.Red);
                    gWater.DrawString("xxxxxxxxx", font, brush1, 2, 2);
                    gWater.DrawString("xxxxxxxxx", font, brush1, 2, 17);
                }

                //将旋转后的图片画到画布上
                ImageAttributes imageAtt = GetAlphaImgAttr(70);
                g.DrawImage(imageWater, new Rectangle(2, imageDest.Height - 42, imageWater.Width, imageWater.Height),
                    0, 0, imageWater.Width, imageWater.Height, GraphicsUnit.Pixel, imageAtt);

                imageDest.Save(destPath);

                imageWater.Dispose();
                imageDest.Dispose();
            }
        }

        /// <summary>
        /// 获取一个带有透明度的ImageAttributes
        /// </summary>
        /// <param name="opcity"></param>
        /// <returns></returns>
        public static ImageAttributes GetAlphaImgAttr(int opcity)
        {
            if (opcity < 0 || opcity > 100)
            {
                throw new ArgumentOutOfRangeException("opcity 值为 0~100");
            }

            //颜色矩阵
            float[][] matrixItems =
            {
                  new float[]{1,0,0,0,0},
                  new float[]{0,1,0,0,0},
                  new float[]{0,0,1,0,0},
                  new float[]{0,0,0,(float)opcity / 100,0},
                  new float[]{0,0,0,0,1}
            };
            ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
            ImageAttributes imageAtt = new ImageAttributes();
            imageAtt.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
            return imageAtt;
        }

        /// <summary>
        /// 获取联系方式的图片路径
        /// </summary>
        /// <returns></returns>
        public static string GetContactPicPath()
        {
            string path = Directory.GetCurrentDirectory();
            string imagePath = Path.Combine(path, "send.jpg");
            return imagePath;
        }
    }
}

新建日志类Logger.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace AssistLib
{
    /// <summary>
    /// 日志类
    /// </summary>
    public class Logger
    {
        /// <summary>
        /// 日志文件路径
        /// </summary>
        public string LogFile { get; set; }

        public Logger()
        {
            string path = Directory.GetCurrentDirectory();
            string logPath = Path.Combine(path, "logs");
            if (!Directory.Exists(logPath))
            {
                Directory.CreateDirectory(logPath);
            }

            string filePath = Path.Combine(logPath, DateTime.Now.ToString("yyyyMMdd") + ".txt");
            if (!File.Exists(filePath))
            {
                File.Create(filePath).Close();
            }

            this.LogFile = filePath;
        }

        /// <summary>
        /// 写日志
        /// </summary>
        /// <param name="log"></param>
        public void Write(string log)
        {
            using (StreamWriter writer = new StreamWriter(this.LogFile,true,Encoding.UTF8))
            {
                writer.WriteLine("{0}:{1}", DateTime.Now, log);
            }
        }
    }
}

新建WinAPI.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace AssistLib
{
    public class WinAPI
    {

        [StructLayout(LayoutKind.Sequential)]
        public struct POINT
        {
            public int X;
            public int Y;
            public POINT(int x, int y)
            {
                this.X = x;
                this.Y = y;
            }
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct Rect
        {
            public int Left;
            public int Top;
            public int Right;
            public int Bottom;
        }

        //移动鼠标 
        public const int MOUSEEVENTF_MOVE = 0x0001;
        //模拟鼠标左键按下 
        public const int MOUSEEVENTF_LEFTDOWN = 0x0002;
        //模拟鼠标左键抬起 
        public const int MOUSEEVENTF_LEFTUP = 0x0004;
        //模拟鼠标右键按下 
        public const int MOUSEEVENTF_RIGHTDOWN = 0x0008;
        //模拟鼠标右键抬起 
        public const int MOUSEEVENTF_RIGHTUP = 0x0010;
        //模拟鼠标中键按下 
        public const int MOUSEEVENTF_MIDDLEDOWN = 0x0020;
        //模拟鼠标中键抬起 
        public const int MOUSEEVENTF_MIDDLEUP = 0x0040;
        //标示是否采用绝对坐标 
        public const int MOUSEEVENTF_ABSOLUTE = 0x8000;

        public const int SW_SHOW = 0x0005;


        public delegate bool EnumWindowsCallBack(IntPtr hwnd, int lParam);

        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        public static extern IntPtr SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

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

        [DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
        public extern static bool SetForegroundWindow(IntPtr hwnd);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx")]
        public static extern IntPtr FindWindowEx(IntPtr parent, IntPtr childe, string strclass, string strname);

        [DllImport("user32.dll", EntryPoint = "GetWindowText")]
        public static extern IntPtr GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "GetClassName")]
        public static extern IntPtr GetClassName(IntPtr hWnd, StringBuilder lpString, int nMaxCont);

        [DllImport("user32.dll", EntryPoint = "EnumWindows")]
        public static extern IntPtr EnumWindows(EnumWindowsCallBack callback, int lParam);

        [DllImport("user32.dll", EntryPoint = "GetParent")]
        public static extern IntPtr GetParent(IntPtr hwnd);

        [DllImport("user32.dll", EntryPoint = "IsWindowVisible")]
        public static extern bool IsWindowVisible(IntPtr hwnd);

        [DllImport("user32.dll", EntryPoint = "SetFocus")]
        public static extern bool SetFocus(IntPtr hwnd);

        [DllImport("user32.dll", EntryPoint = "SetActiveWindow")]
        public static extern IntPtr SetActiveWindow(IntPtr hwnd);

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

        [DllImport("user32")]
        public static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

        [DllImport("user32")]
        public static extern bool SetCursorPos(int X, int Y);

        [DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]
        public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

        [DllImport("user32.dll")]
        public static extern bool GetCursorPos(out POINT lpPoint);

        [DllImport("user32.dll")]
        public static extern bool GetWindowRect(IntPtr hwnd, out Rect lpRect);

    }
}

新建粘贴板帮助类ClipboardHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace AssistLib
{
    /// <summary>
    /// Helper to encode and set HTML fragment to clipboard.<br/>
    /// See http://theartofdev.com/2014/06/12/setting-htmltext-to-clipboard-revisited/.<br/>
    /// <seealso cref="CreateDataObject"/>.
    /// </summary>
    /// <remarks>
    /// The MIT License (MIT) Copyright (c) 2014 Arthur Teplitzki.
    /// </remarks>
    public static class ClipboardHelper
    {
        #region Fields and Consts

        /// <summary>
        /// The string contains index references to other spots in the string, so we need placeholders so we can compute the offsets. <br/>
        /// The <![CDATA[<<<<<<<]]>_ strings are just placeholders. We'll back-patch them actual values afterwards. <br/>
        /// The string layout (<![CDATA[<<<]]>) also ensures that it can't appear in the body of the html because the <![CDATA[<]]> <br/>
        /// character must be escaped. <br/>
        /// </summary>
        private const string Header = @"Version:0.9
StartHTML:<<<<<<<<1
EndHTML:<<<<<<<<2
StartFragment:<<<<<<<<3
EndFragment:<<<<<<<<4";

        //StartSelection:<<<<<<<<3
        //EndSelection:<<<<<<<<4";

        /// <summary>
        /// html comment to point the beginning of html fragment
        /// </summary>
        public const string StartFragment = "<!--StartFragment-->";

        /// <summary>
        /// html comment to point the end of html fragment
        /// </summary>
        public const string EndFragment = @"<!--EndFragment-->";

        /// <summary>
        /// Used to calculate characters byte count in UTF-8
        /// </summary>
        private static readonly char[] _byteCount = new char[1];

        #endregion


        /// <summary>
        /// Create <see cref="DataObject"/> with given html and plain-text ready to be used for clipboard or drag and drop.<br/>
        /// Handle missing <![CDATA[<html>]]> tags, specified start\end segments and Unicode characters.
        /// </summary>
        /// <remarks>
        /// <para>
        /// Windows Clipboard works with UTF-8 Unicode encoding while .NET strings use with UTF-16 so for clipboard to correctly
        /// decode Unicode string added to it from .NET we needs to be re-encoded it using UTF-8 encoding.
        /// </para>
        /// <para>
        /// Builds the CF_HTML header correctly for all possible HTMLs<br/>
        /// If given html contains start/end fragments then it will use them in the header:
        /// <code><![CDATA[<html><body><!--StartFragment-->hello <b>world</b><!--EndFragment--></body></html>]]></code>
        /// If given html contains html/body tags then it will inject start/end fragments to exclude html/body tags:
        /// <code><![CDATA[<html><body>hello <b>world</b></body></html>]]></code>
        /// If given html doesn't contain html/body tags then it will inject the tags and start/end fragments properly:
        /// <code><![CDATA[hello <b>world</b>]]></code>
        /// In all cases creating a proper CF_HTML header:<br/>
        /// <code>
        /// <![CDATA[
        /// Version:1.0
        /// StartHTML:000000177
        /// EndHTML:000000329
        /// StartFragment:000000277
        /// EndFragment:000000295
        /// StartSelection:000000277
        /// EndSelection:000000277
        /// <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
        /// <html><body><!--StartFragment-->hello <b>world</b><!--EndFragment--></body></html>
        /// ]]>
        /// </code>
        /// See format specification here: http://msdn.microsoft.com/library/default.asp?url=/workshop/networking/clipboard/htmlclipboard.asp
        /// </para>
        /// </remarks>
        /// <param name="html">a html fragment</param>
        /// <param name="plainText">the plain text</param>
        public static DataObject CreateDataObject(string html, string plainText)
        {
            html = html ?? String.Empty;
            var htmlFragment = GetHtmlDataString(html);

            // re-encode the string so it will work correctly (fixed in CLR 4.0)
            if (Environment.Version.Major < 4 && html.Length != Encoding.UTF8.GetByteCount(html))
                htmlFragment = Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(htmlFragment));

            //特别注意，这里要做转换保存，否则乱码，粘贴板不支持UTF8保存
            var htmlFragmentBytes = Encoding.UTF8.GetBytes(htmlFragment);
            var htmlFragmentData = Encoding.Default.GetString(htmlFragmentBytes);

            var dataObject = new DataObject();
            dataObject.SetData(DataFormats.Html, htmlFragmentData);
            dataObject.SetData(DataFormats.Text, plainText);
            dataObject.SetData(DataFormats.UnicodeText, plainText);
            return dataObject;
        }

        /// <summary>
        /// Clears clipboard and sets the given HTML and plain text fragment to the clipboard, providing additional meta-information for HTML.<br/>
        /// See <see cref="CreateDataObject"/> for HTML fragment details.<br/>
        /// </summary>
        /// <example>
        /// ClipboardHelper.CopyToClipboard("Hello <b>World</b>", "Hello World");
        /// </example>
        /// <param name="html">a html fragment</param>
        /// <param name="plainText">the plain text</param>
        public static void CopyToClipboard(string html, string plainText)
        {
            var dataObject = CreateDataObject(html, plainText);
            Clipboard.SetDataObject(dataObject, true);
        }

        /// <summary>
        /// Generate HTML fragment data string with header that is required for the clipboard.
        /// </summary>
        /// <param name="html">the html to generate for</param>
        /// <returns>the resulted string</returns>
        private static string GetHtmlDataString(string html)
        {
            var sb = new StringBuilder();
            sb.AppendLine(Header);
            sb.AppendLine(@"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">");

            // if given html already provided the fragments we won't add them
            int fragmentStart, fragmentEnd;
            int fragmentStartIdx = html.IndexOf(StartFragment, StringComparison.OrdinalIgnoreCase);
            int fragmentEndIdx = html.LastIndexOf(EndFragment, StringComparison.OrdinalIgnoreCase);

            // if html tag is missing add it surrounding the given html (critical)
            int htmlOpenIdx = html.IndexOf("<html", StringComparison.OrdinalIgnoreCase);
            int htmlOpenEndIdx = htmlOpenIdx > -1 ? html.IndexOf('>', htmlOpenIdx) + 1 : -1;
            int htmlCloseIdx = html.LastIndexOf("</html", StringComparison.OrdinalIgnoreCase);

            if (fragmentStartIdx < 0 && fragmentEndIdx < 0)
            {
                int bodyOpenIdx = html.IndexOf("<body", StringComparison.OrdinalIgnoreCase);
                int bodyOpenEndIdx = bodyOpenIdx > -1 ? html.IndexOf('>', bodyOpenIdx) + 1 : -1;

                if (htmlOpenEndIdx < 0 && bodyOpenEndIdx < 0)
                {
                    // the given html doesn't contain html or body tags so we need to add them and place start/end fragments around the given html only
                    sb.Append("<html><body>");
                    sb.Append(StartFragment);
                    fragmentStart = GetByteCount(sb);
                    sb.Append(html);
                    fragmentEnd = GetByteCount(sb);
                    sb.Append(EndFragment);
                    sb.Append("</body></html>");
                }
                else
                {
                    // insert start/end fragments in the proper place (related to html/body tags if exists) so the paste will work correctly
                    int bodyCloseIdx = html.LastIndexOf("</body", StringComparison.OrdinalIgnoreCase);

                    if (htmlOpenEndIdx < 0)
                        sb.Append("<html>");
                    else
                        sb.Append(html, 0, htmlOpenEndIdx);

                    if (bodyOpenEndIdx > -1)
                        sb.Append(html, htmlOpenEndIdx > -1 ? htmlOpenEndIdx : 0, bodyOpenEndIdx - (htmlOpenEndIdx > -1 ? htmlOpenEndIdx : 0));

                    sb.Append(StartFragment);
                    fragmentStart = GetByteCount(sb);

                    var innerHtmlStart = bodyOpenEndIdx > -1 ? bodyOpenEndIdx : (htmlOpenEndIdx > -1 ? htmlOpenEndIdx : 0);
                    var innerHtmlEnd = bodyCloseIdx > -1 ? bodyCloseIdx : (htmlCloseIdx > -1 ? htmlCloseIdx : html.Length);
                    sb.Append(html, innerHtmlStart, innerHtmlEnd - innerHtmlStart);

                    fragmentEnd = GetByteCount(sb);
                    sb.Append(EndFragment);

                    if (innerHtmlEnd < html.Length)
                        sb.Append(html, innerHtmlEnd, html.Length - innerHtmlEnd);

                    if (htmlCloseIdx < 0)
                        sb.Append("</html>");
                }
            }
            else
            {
                // handle html with existing start\end fragments just need to calculate the correct bytes offset (surround with html tag if missing)
                if (htmlOpenEndIdx < 0)
                    sb.Append("<html>");
                int start = GetByteCount(sb);
                sb.Append(html);
                fragmentStart = start + GetByteCount(sb, start, start + fragmentStartIdx) + StartFragment.Length;
                fragmentEnd = start + GetByteCount(sb, start, start + fragmentEndIdx);
                if (htmlCloseIdx < 0)
                    sb.Append("</html>");
            }

            // Back-patch offsets (scan only the header part for performance)
            sb.Replace("<<<<<<<<1", Header.Length.ToString("D9"), 0, Header.Length);
            sb.Replace("<<<<<<<<2", GetByteCount(sb).ToString("D9"), 0, Header.Length);
            sb.Replace("<<<<<<<<3", fragmentStart.ToString("D9"), 0, Header.Length);
            sb.Replace("<<<<<<<<4", fragmentEnd.ToString("D9"), 0, Header.Length);

            return sb.ToString();
        }

        /// <summary>
        /// Calculates the number of bytes produced by encoding the string in the string builder in UTF-8 and not .NET default string encoding.
        /// </summary>
        /// <param name="sb">the string builder to count its string</param>
        /// <param name="start">optional: the start index to calculate from (default - start of string)</param>
        /// <param name="end">optional: the end index to calculate to (default - end of string)</param>
        /// <returns>the number of bytes required to encode the string in UTF-8</returns>
        private static int GetByteCount(StringBuilder sb, int start = 0, int end = -1)
        {
            int count = 0;
            end = end > -1 ? end : sb.Length;
            for (int i = start; i < end; i++)
            {
                _byteCount[0] = sb[i];
                count += Encoding.Default.GetByteCount(_byteCount);
            }
            return count;
        }
    }
}

新建窗体项目AssistWFA

由于界面部分代码比较多，很多代码都是系统自动生成的，没有必要贴代码。
我把截图贴上去：

主界面

 

设置界面

 

群列表界面

 

问候语界面

 

本群发器的特点：

• 简单高效
• 稳定
• 配置参数少

功能使用注意：

• 要打开所以群窗口，不可以合并窗口
• 不支持锁屏挂机

就这么多，这是根据自己的需求编写的，功能比较简单，够用就行，关键是稳定，不掉线。
有不明的地方或者需要源码的朋友可以联系我，微信：xiaoqiu20121212