diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4dd1a6c..7d59485 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,22 @@
 # CSerialPort Changelog
 
-
 ---
 
+## v4.3.0 (2023-02-15)
+
+Feature:
+* readEvent replace with CSerialPortListener 使用CSerialPortListener进行读取事件通知
+* replace std::string with const char* as much as possible 尽可能使用const char*代替std::string
+* add function getReadBufferUsedLen() to get used buffer length 增加getReadBufferUsedLen函数用于获取缓冲区长度
+* add LOG_INFO to output CSerialPort info 增加LOG_INFO输出串口信息
+
+## v4.2.2 (2023-02-15)
+
+Feature:
+* read event notify with portName and readBufferLen 读取事件通知支持串口名称与长度
+* add function getReadBufferUsedLen() to get used buffer length 增加getReadBufferUsedLen函数用于获取缓冲区长度
+* add LOG_INFO to output CSerialPort info 增加LOG_INFO输出串口信息
+
 ## v4.2.1 (2022-11-07)
 
 Feature:
diff --git a/README.md b/README.md
index 0b5252b..094ff93 100644
--- a/README.md
+++ b/README.md
@@ -58,8 +58,8 @@ CSerialPort was tested on the following platforms
 
 # Latest version
 
-## Version: 4.2.1.221107
-by itas109 on 2022-11-07
+## Version: 4.3.0.230215
+by itas109 on 2023-02-15
 
 # Quick Start
 
@@ -75,7 +75,7 @@ run demo ( for example serial port lookback test on linux)
 
 ```
 CSerialPort/bin $ ./bin/CSerialPortDemoNoGui
-Version: https://github.com/itas109/CSerialPort - V4.2.1.221107
+Version: https://github.com/itas109/CSerialPort - V4.3.0.230215
 
 availableFriendlyPorts:
 1 - /dev/ttyS0
diff --git a/README_zh_CN.md b/README_zh_CN.md
index 9320353..56fd899 100644
--- a/README_zh_CN.md
+++ b/README_zh_CN.md
@@ -59,8 +59,8 @@ CSerialPort已经在以下平台做过测试
 
 # Latest version 最新版本
 
-## Version: 4.2.1.221107
-by itas109 on 2022-11-07
+## Version: 4.3.0.230215
+by itas109 on 2023-02-15
 
 # Quick Start 快速开始
 
@@ -76,7 +76,7 @@ $ cmake --build .
 
 ```
 CSerialPort/bin $ ./bin/CSerialPortDemoNoGui
-Version: https://github.com/itas109/CSerialPort - V4.2.1.221107
+Version: https://github.com/itas109/CSerialPort - V4.3.0.230215
 
 availableFriendlyPorts:
 1 - /dev/ttyS0
diff --git a/VERSION b/VERSION
index 801cd11..d1c7b0a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.2.1.221107
+4.3.0.230215
\ No newline at end of file
diff --git a/doc/CSerialPort_doc_cn.chm b/doc/CSerialPort_doc_cn.chm
index 2faf939..af7b1de 100644
Binary files a/doc/CSerialPort_doc_cn.chm and b/doc/CSerialPort_doc_cn.chm differ
diff --git a/doc/CSerialPort_doc_en.chm b/doc/CSerialPort_doc_en.chm
index 0f6f12f..00a8ad1 100644
Binary files a/doc/CSerialPort_doc_en.chm and b/doc/CSerialPort_doc_en.chm differ
diff --git a/include/CSerialPort/SerialPort_version.h b/include/CSerialPort/SerialPort_version.h
index f892a5a..c18ba8f 100644
--- a/include/CSerialPort/SerialPort_version.h
+++ b/include/CSerialPort/SerialPort_version.h
@@ -14,7 +14,7 @@
 #define __CSERIALPORT_VERSION_H__
 
 #define CSERIALPORT_COPYRIGHT "Copyright (C) 2014 itas109. All Rights Reserved."
-#define CSERIALPORT_VERSION "4.2.1.221107"
+#define CSERIALPORT_VERSION "4.3.0.230215"
 #define CSERIALPORT_VERSION_MAJOR 4
 #define CSERIALPORT_VERSION_MINOR 2
 #define CSERIALPORT_VERSION_PATCH 1
diff --git a/test/CSerialPortVirtual.cpp b/test/CSerialPortVirtual.cpp
index d3ae628..2e0e718 100644
--- a/test/CSerialPortVirtual.cpp
+++ b/test/CSerialPortVirtual.cpp
@@ -3,7 +3,7 @@
 
 #ifdef _WIN32
 #include <Windows.h>
-#include <tchar.h> // _T
+#include <tchar.h> //_T
 #else
 #include <errno.h>      // perror
 #include <pty.h>        // openpty
@@ -24,7 +24,30 @@ CSerialPortVirtual::~CSerialPortVirtual() {}
 bool CSerialPortVirtual::createPair(char *portName1, char *portName2)
 {
 #ifdef _WIN32
-    return false;
+    bool ret = false;
+    HINSTANCE libInst;
+
+    if (8 == sizeof(char *)) // 64bit application
+    {
+        libInst = LoadLibrary(_T("VSPDCTL64.DLL"));
+    }
+    else
+    {
+        libInst = LoadLibrary(_T("VSPDCTL.DLL"));
+    }
+
+    if (libInst)
+    {
+        typedef bool(__stdcall * CreatePairFn)(char *Port1, char *Port2);
+        CreatePairFn CreatePair = (CreatePairFn)GetProcAddress(libInst, "CreatePair");
+        if (CreatePair)
+        {
+            ret = CreatePair(portName1, portName2); // portName1 = "COM1", portName2 = "COM2"
+        }
+        FreeLibrary(libInst);
+    }
+
+    return ret;
 #else
     int error = -1;
 
@@ -109,7 +132,30 @@ bool CSerialPortVirtual::createPair(char *portName1, char *portName2)
 bool itas109::CSerialPortVirtual::deletePair(char *portName)
 {
 #ifdef _WIN32
-    return false;
+    bool ret = false;
+    HINSTANCE libInst;
+
+    if (8 == sizeof(char *)) // 64bit application
+    {
+        libInst = LoadLibrary(_T("VSPDCTL64.DLL"));
+    }
+    else
+    {
+        libInst = LoadLibrary(_T("VSPDCTL.DLL"));
+    }
+
+    if (libInst)
+    {
+        typedef bool(__stdcall * DeletePairFn)(char *Port1);
+        DeletePairFn DeletePair = (DeletePairFn)GetProcAddress(libInst, "DeletePair");
+        if (DeletePair)
+        {
+            ret = DeletePair(portName);
+        }
+        FreeLibrary(libInst);
+    }
+
+    return ret;
 #else
     return true;
 #endif
diff --git a/test/CSerialPortVirtual.h b/test/CSerialPortVirtual.h
index ee41f28..0af78bf 100644
--- a/test/CSerialPortVirtual.h
+++ b/test/CSerialPortVirtual.h
@@ -19,10 +19,11 @@ class CSerialPortVirtual
     CSerialPortVirtual();
     ~CSerialPortVirtual();
 
-    static bool createPair(char *portName1, char *portName2);
-    static bool deletePair(char *portName);
+    static bool createPair(char* portName1, char* portName2);
+    static bool deletePair(char* portName);
 
 private:
+    
 };
 } // namespace itas109
 #endif //__CSERIALPORT_VIRTUAL_H__