diff --git a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.Designer.cs b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.Designer.cs
index 11b3e4a..1bd18e7 100644
--- a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.Designer.cs
+++ b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.Designer.cs
@@ -28,6 +28,7 @@
         /// </summary>
         private void InitializeComponent()
         {
+            this.components = new System.ComponentModel.Container();
             this.txtPath = new System.Windows.Forms.TextBox();
             this.lblPathTag = new System.Windows.Forms.Label();
             this.btnChoosePath = new System.Windows.Forms.Button();
@@ -38,6 +39,8 @@
             this.linkLabel1 = new System.Windows.Forms.LinkLabel();
             this.label3 = new System.Windows.Forms.Label();
             this.label4 = new System.Windows.Forms.Label();
+            this.button1 = new System.Windows.Forms.Button();
+            this.mutexHandleCloseTimer = new System.Windows.Forms.Timer(this.components);
             ((System.ComponentModel.ISupportInitialize)(this.startNum)).BeginInit();
             this.SuspendLayout();
             // 
@@ -94,7 +97,7 @@
             0,
             0});
             this.startNum.Minimum = new decimal(new int[] {
-            2,
+            1,
             0,
             0,
             0});
@@ -102,7 +105,7 @@
             this.startNum.Size = new System.Drawing.Size(55, 21);
             this.startNum.TabIndex = 12;
             this.startNum.Value = new decimal(new int[] {
-            2,
+            1,
             0,
             0,
             0});
@@ -146,11 +149,26 @@
             this.label4.TabIndex = 16;
             this.label4.Text = "注意：\r\n1. 使用本程序多开前不能存在正在运行的微信进程。\r\n2. 多开的成功率取决于你的机器性能，不保证每次都能成功";
             // 
+            // button1
+            // 
+            this.button1.Location = new System.Drawing.Point(369, 190);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(75, 23);
+            this.button1.TabIndex = 17;
+            this.button1.Text = "button1";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
+            // 
+            // mutexHandleCloseTimer
+            // 
+            this.mutexHandleCloseTimer.Tick += new System.EventHandler(this.mutexHandleCloseTimer_Tick);
+            // 
             // FormMultiInstance
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(472, 133);
+            this.ClientSize = new System.Drawing.Size(472, 259);
+            this.Controls.Add(this.button1);
             this.Controls.Add(this.label4);
             this.Controls.Add(this.linkLabel1);
             this.Controls.Add(this.label3);
@@ -181,6 +199,8 @@
         private System.Windows.Forms.LinkLabel linkLabel1;
         private System.Windows.Forms.Label label3;
         private System.Windows.Forms.Label label4;
+        private System.Windows.Forms.Button button1;
+        private System.Windows.Forms.Timer mutexHandleCloseTimer;
     }
 }
 
diff --git a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.cs b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.cs
index 1f566ef..5508f15 100644
--- a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.cs
+++ b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.cs
@@ -47,25 +47,21 @@ namespace RevokeMsgPatcher.MultiInstance
         {
             if (File.Exists(txtPath.Text))
             {
-                // 检测微信进程是否存在
-                Process[] ps = Process.GetProcessesByName("WeChat");
-                if (ps.Length > 0)
-                {
-                    DialogResult result = MessageBox.Show("当前存在运行中的微信进程，请先关闭当前微信才能使用该功能。点击【确定】强制关闭当前所有微信进程并进行多开，点击【取消】不做任何处理。", "当前存在运行中的微信进程", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
-                    if (result == DialogResult.OK)
-                    {
-                        foreach (Process p in ps)
-                            p.Kill();
-                    }
-                    else
-                    {
-                        return;
-                    }
-                }
+                Process[] processes = Process.GetProcessesByName("WeChat");
+                ProcessUtil.CloseMutexHandle(processes);
                 // 启动多个实例
                 for (int i = 0; i < startNum.Value; i++)
                 {
-                    Process.Start(txtPath.Text);
+                    //var t = new Task(() =>
+                    //{
+                    //    Process newInstance = Process.Start(txtPath.Text);
+                    //    newInstance.WaitForInputIdle();
+                    //    ProcessUtil.CloseMutexHandle(newInstance);
+                    //});
+                    //t.Start();
+                    Process newInstance = Process.Start(txtPath.Text);
+                    //newInstance.WaitForInputIdle();
+                    //ProcessUtil.CloseMutexHandle(newInstance);
                 }
             }
         }
@@ -107,5 +103,16 @@ namespace RevokeMsgPatcher.MultiInstance
             }
             return null;
         }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            Process[] processes = Process.GetProcessesByName("WeChat");
+            ProcessUtil.CloseMutexHandle(processes);
+        }
+
+        private void mutexHandleCloseTimer_Tick(object sender, EventArgs e)
+        {
+
+        }
     }
 }
diff --git a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.resx b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.resx
index 1af7de1..06e74a4 100644
--- a/RevokeMsgPatcher.MultiInstance/FormMultiInstance.resx
+++ b/RevokeMsgPatcher.MultiInstance/FormMultiInstance.resx
@@ -117,4 +117,7 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <metadata name="mutexHandleCloseTimer.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
 </root>
\ No newline at end of file
diff --git a/RevokeMsgPatcher.MultiInstance/ProcessUtil.cs b/RevokeMsgPatcher.MultiInstance/ProcessUtil.cs
new file mode 100644
index 0000000..7818c38
--- /dev/null
+++ b/RevokeMsgPatcher.MultiInstance/ProcessUtil.cs
@@ -0,0 +1,229 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RevokeMsgPatcher.MultiInstance
+{
+    /// <summary>
+    /// 微信多开原理：
+    /// https://mp.weixin.qq.com/s/bb7XMxop7e8rd7YqQ88nyA
+    /// 参考：
+    /// https://stackoverflow.com/questions/54872228/c-sharp-how-to-find-all-handles-associated-with-current-process
+    /// https://hintdesk.com/2010/05/22/c-get-all-handles-of-a-given-process-in-64-bits/
+    /// </summary>
+    public class ProcessUtil
+    {
+        /// <summary>
+        /// https://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/sysinfo/handle_table_entry.htm?ts=0,242
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        public struct SYSTEM_HANDLE_INFORMATION
+        { // Information Class 16
+            public ushort ProcessID;
+            public ushort CreatorBackTrackIndex;
+            public byte ObjectType;
+            public byte HandleAttribute;
+            public ushort Handle;
+            public IntPtr Object_Pointer;
+            public IntPtr AccessMask;
+        }
+
+        private enum OBJECT_INFORMATION_CLASS : int
+        {
+            ObjectBasicInformation = 0,
+            ObjectNameInformation = 1,
+            ObjectTypeInformation = 2,
+            ObjectAllTypesInformation = 3,
+            ObjectHandleInformation = 4
+        }
+
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        private struct OBJECT_NAME_INFORMATION
+        { // Information Class 1
+            public UNICODE_STRING Name;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        private struct UNICODE_STRING
+        {
+            public ushort Length;
+            public ushort MaximumLength;
+            public IntPtr Buffer;
+        }
+
+        [Flags]
+        private enum PROCESS_ACCESS_FLAGS : uint
+        {
+            All = 0x001F0FFF,
+            Terminate = 0x00000001,
+            CreateThread = 0x00000002,
+            VMOperation = 0x00000008,
+            VMRead = 0x00000010,
+            VMWrite = 0x00000020,
+            DupHandle = 0x00000040,
+            SetInformation = 0x00000200,
+            QueryInformation = 0x00000400,
+            Synchronize = 0x00100000
+        }
+
+        [DllImport("ntdll.dll")]
+        private static extern uint NtQuerySystemInformation(int SystemInformationClass, IntPtr SystemInformation, int SystemInformationLength, ref int returnLength);
+
+        [DllImport("kernel32.dll")]
+        private static extern IntPtr OpenProcess(PROCESS_ACCESS_FLAGS dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        private static extern bool DuplicateHandle(IntPtr hSourceProcessHandle, IntPtr hSourceHandle, IntPtr hTargetProcessHandle, out IntPtr lpTargetHandle, uint dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, uint dwOptions);
+
+        [DllImport("kernel32.dll")]
+        private static extern IntPtr GetCurrentProcess();
+
+        [DllImport("ntdll.dll")]
+        private static extern int NtQueryObject(IntPtr ObjectHandle, int ObjectInformationClass, IntPtr ObjectInformation, int ObjectInformationLength, ref int returnLength);
+
+        [DllImport("kernel32.dll")]
+        private static extern bool CloseHandle(IntPtr hObject);
+
+        [DllImport("kernel32.dll")]
+        private static extern bool GetHandleInformation(IntPtr hObject, out uint lpdwFlags);
+
+        private const uint STATUS_INFO_LENGTH_MISMATCH = 0xC0000004;
+        private const int DUPLICATE_CLOSE_SOURCE = 0x1;
+        private const int DUPLICATE_SAME_ACCESS = 0x2;
+
+        private const int CNST_SYSTEM_HANDLE_INFORMATION = 0x10;
+        private const int OBJECT_TYPE_MUTANT = 17;
+
+        public static List<SYSTEM_HANDLE_INFORMATION> GetHandles(Process process)
+        {
+            List<SYSTEM_HANDLE_INFORMATION> aHandles = new List<SYSTEM_HANDLE_INFORMATION>();
+            int handle_info_size = Marshal.SizeOf(new SYSTEM_HANDLE_INFORMATION()) * 20000;
+            IntPtr ptrHandleData = IntPtr.Zero;
+            try
+            {
+                ptrHandleData = Marshal.AllocHGlobal(handle_info_size);
+                int nLength = 0;
+
+                while (NtQuerySystemInformation(CNST_SYSTEM_HANDLE_INFORMATION, ptrHandleData, handle_info_size, ref nLength) == STATUS_INFO_LENGTH_MISMATCH)
+                {
+                    handle_info_size = nLength;
+                    Marshal.FreeHGlobal(ptrHandleData);
+                    ptrHandleData = Marshal.AllocHGlobal(nLength);
+                }
+
+                long handle_count = Marshal.ReadIntPtr(ptrHandleData).ToInt64();
+                IntPtr ptrHandleItem = ptrHandleData + Marshal.SizeOf(ptrHandleData);
+
+                for (long lIndex = 0; lIndex < handle_count; lIndex++)
+                {
+                    SYSTEM_HANDLE_INFORMATION oSystemHandleInfo = new SYSTEM_HANDLE_INFORMATION();
+                    oSystemHandleInfo = (SYSTEM_HANDLE_INFORMATION)Marshal.PtrToStructure(ptrHandleItem, oSystemHandleInfo.GetType());
+                    ptrHandleItem += Marshal.SizeOf(new SYSTEM_HANDLE_INFORMATION());
+                    if (oSystemHandleInfo.ProcessID != process.Id) { continue; }
+                    aHandles.Add(oSystemHandleInfo);
+                }
+            }
+            catch (Exception ex)
+            {
+                throw ex;
+            }
+            finally
+            {
+                Marshal.FreeHGlobal(ptrHandleData);
+            }
+            return aHandles;
+        }
+
+        public static void FindAndCloseWeChatMutexHandle(SYSTEM_HANDLE_INFORMATION systemHandleInformation, Process process)
+        {
+            IntPtr ipHandle = IntPtr.Zero;
+            IntPtr openProcessHandle = IntPtr.Zero;
+            IntPtr hObjectName = IntPtr.Zero;
+            try
+            {
+                PROCESS_ACCESS_FLAGS flags = PROCESS_ACCESS_FLAGS.DupHandle | PROCESS_ACCESS_FLAGS.VMRead;
+                openProcessHandle = OpenProcess(flags, false, process.Id);
+                // 通过 DuplicateHandle 访问句柄
+                if (!DuplicateHandle(openProcessHandle, new IntPtr(systemHandleInformation.Handle), GetCurrentProcess(), out ipHandle, 0, false, DUPLICATE_SAME_ACCESS))
+                {
+                    return;
+                }
+
+                int nLength = 0;
+                hObjectName = Marshal.AllocHGlobal(256 * 1024);
+
+                // 查询句柄名称
+                while ((uint)(NtQueryObject(ipHandle, (int)OBJECT_INFORMATION_CLASS.ObjectNameInformation, hObjectName, nLength, ref nLength)) == STATUS_INFO_LENGTH_MISMATCH)
+                {
+                    Marshal.FreeHGlobal(hObjectName);
+                    if (nLength == 0)
+                    {
+                        Console.WriteLine("Length returned at zero!");
+                        return;
+                    }
+                    hObjectName = Marshal.AllocHGlobal(nLength);
+                }
+                OBJECT_NAME_INFORMATION objObjectName = new OBJECT_NAME_INFORMATION();
+                objObjectName = (OBJECT_NAME_INFORMATION)Marshal.PtrToStructure(hObjectName, objObjectName.GetType());
+
+                if (objObjectName.Name.Buffer != IntPtr.Zero)
+                {
+                    string strObjectName = Marshal.PtrToStringUni(objObjectName.Name.Buffer);
+                    Console.WriteLine(strObjectName);
+                    //  \Sessions\1\BaseNamedObjects\_WeChat_App_Instance_Identity_Mutex_Name
+                    if (strObjectName.Contains("_Instance_Identity_Mutex_Name"))
+                    {
+                        // 通过 DuplicateHandle DUPLICATE_CLOSE_SOURCE 关闭句柄
+                        IntPtr mHandle = IntPtr.Zero;
+                        if (DuplicateHandle(openProcessHandle, new IntPtr(systemHandleInformation.Handle), GetCurrentProcess(), out mHandle, 0, false, DUPLICATE_CLOSE_SOURCE))
+                        {
+                            CloseHandle(mHandle);
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message);
+            }
+            finally
+            {
+                Marshal.FreeHGlobal(hObjectName);
+                CloseHandle(ipHandle);
+                CloseHandle(openProcessHandle);
+            }
+        }
+
+        /// <summary>
+        /// 关闭微信的互斥句柄
+        /// </summary>
+        /// <param name="processes">微信的进程</param>
+        /// <returns></returns>
+        public static void CloseMutexHandle(Process[] processes)
+        {
+            foreach (Process process in processes)
+            {
+                CloseMutexHandle(process);
+            }
+        }
+
+        public static void CloseMutexHandle(Process process)
+        {
+            List<SYSTEM_HANDLE_INFORMATION> aHandles = GetHandles(process);
+            foreach (SYSTEM_HANDLE_INFORMATION handle in aHandles)
+            {
+                // Mutant 类型的句柄
+                if (handle.ObjectType == OBJECT_TYPE_MUTANT)
+                {
+                    FindAndCloseWeChatMutexHandle(handle, process);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/RevokeMsgPatcher.MultiInstance/RevokeMsgPatcher.MultiInstance.csproj b/RevokeMsgPatcher.MultiInstance/RevokeMsgPatcher.MultiInstance.csproj
index 2ed2fcd..0f89bf3 100644
--- a/RevokeMsgPatcher.MultiInstance/RevokeMsgPatcher.MultiInstance.csproj
+++ b/RevokeMsgPatcher.MultiInstance/RevokeMsgPatcher.MultiInstance.csproj
@@ -51,6 +51,7 @@
     <Compile Include="FormMultiInstance.Designer.cs">
       <DependentUpon>FormMultiInstance.cs</DependentUpon>
     </Compile>
+    <Compile Include="ProcessUtil.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="FormMultiInstance.resx">