diff --git a/CWeChatRobot/WeChatRobotCOM.idl b/CWeChatRobot/WeChatRobotCOM.idl
index 9e87daa2c88ab711165c19239c7d58b2200d2125..53fffdfda6b2f4b70d5d4393cb3a95ee876980bb 100644
--- a/CWeChatRobot/WeChatRobotCOM.idl
+++ b/CWeChatRobot/WeChatRobotCOM.idl
@@ -69,7 +69,7 @@ interface IWeChatRobot : IDispatch
 interface IRobotEvent : IDispatch
 {
 	[id(1), helpstring("用于微信主动推送消息")] HRESULT CPostMessage([in] DWORD pid, [in] int msgtype, [in] VARIANT* msg, [out, retval] int* __result);
-	[id(2), helpstring("用于微信主动推送消息")] HRESULT CRegisterWxPidWithCookie([in] DWORD pid, [in] DWORD cookie, [out, retval] int* __result);
+	[id(2), helpstring("用于客户端通过微信PID注册消息接收服务")] HRESULT CRegisterWxPidWithCookie([in] DWORD pid, [in] DWORD cookie, [out, retval] int* __result);
 };
 [
 	uuid(721abb35-141a-4aa2-94f2-762e2833fa6c),
diff --git a/CWeChatRobot/pch.cpp b/CWeChatRobot/pch.cpp
index afc314a57b1dae3c7bf901fa1c60335de7faba36..e6bd2b86d27ab680a9b6ef2cd77d143cca2337f9 100644
--- a/CWeChatRobot/pch.cpp
+++ b/CWeChatRobot/pch.cpp
@@ -2,6 +2,14 @@
 
 #include "pch.h"
 
+/*
+ * 保证RobotService可以重复调用及停止，类似于可重入锁，用于支持多个客户端同时调用
+ * StopRobotService的次数必须不小于StartRobotService才可以停止服务，当服务已经停止后
+ * 可以重复调用StopRobotService，但只需一次StartRobotService即可将计数置0并开启服务
+ */
+map<DWORD, short> ServiceCount;
+
+
 // 当使用预编译的头时，需要使用此源文件，编译才能成功。
 
 BOOL isFileExists_stat(string& name) {
@@ -54,18 +62,37 @@ DWORD GetWeChatPid() {
     return wxPid;
 }
 
-DWORD StartRobotService(DWORD pid) {
-    wstring wworkPath = GetComWorkPath();
-    wchar_t* workPath = (wchar_t*)wworkPath.c_str();
-    bool status = Inject(pid, workPath);
-    return status;
+DWORD StartRobotService(DWORD pid)
+{
+    if (ServiceCount[pid] < 0)
+    {
+        ServiceCount[pid] = 0;
+    }
+    if (ServiceCount[pid] == 0)
+    {
+        wstring wworkPath = GetComWorkPath();
+        wchar_t* workPath = (wchar_t*)wworkPath.c_str();
+        bool status = Inject(pid, workPath);
+        if (!status)
+        {
+            ++ServiceCount[pid];
+        }
+        return status;
+    }
+    ++ServiceCount[pid];
+    return 0;
 }
 
-DWORD StopRobotService(DWORD pid) {
+DWORD StopRobotService(DWORD pid)
+{
     DWORD cpid = GetCurrentProcessId();
     if (pid == 0)
         return cpid;
-    RemoveDll(pid);
+    --ServiceCount[pid];
+    if (ServiceCount[pid] == 0)
+    {
+        RemoveDll(pid);
+    }
     return 0;
 }
 
diff --git a/CWeChatRobot/pch.h b/CWeChatRobot/pch.h
index 7472bbd3302199c61c7e4e957cf9fc27069aa8aa..47d48137d9543cc693559a5be3cf7fa6ca1fded3 100644
--- a/CWeChatRobot/pch.h
+++ b/CWeChatRobot/pch.h
@@ -15,13 +15,14 @@
 #include "stdlib.h"
 #include <tchar.h>
 #include <stdio.h>
-#include <windows.h>
+#include <Windows.h>
 #include <TlHelp32.h>
 #include <atlconv.h>
 #include <tchar.h>
 #include <sys/stat.h>
 #include <direct.h>
 #include <vector>
+#include <map>
 
 #include <comutil.h>
 #pragma comment(lib, "comsuppw.lib")
diff --git a/Release/CWeChatRobot.exe b/Release/CWeChatRobot.exe
index 2da3559ee3663849474f1906a9a5063af690e9ed..298a46c13e64a610907a057e0a4b251ac9e98024 100644
Binary files a/Release/CWeChatRobot.exe and b/Release/CWeChatRobot.exe differ