diff --git a/.gitignore b/.gitignore
index 53d8770..bea2ad5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,5 @@ build
 cmake-*
 .idea
 .vs
-.cache
\ No newline at end of file
+.cache
+xpbuild
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 496b033..26afbc4 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -24,16 +24,12 @@
         "-Wno-dev"
     ],
     "cmake.environment": {
-        "QT_LIB_ROOT": "C:/Qt/Qt5.6.3/5.6.3/mingw49_32",
-        "PATH": "${env:PATH};C:/Qt/Qt5.6.3/5.6.3/mingw49_32/bin"
+        "QT_LIB_ROOT": "D:/Dev/Qt6/msvc2022_64",
+        "PATH": "${env:PATH};D:/Dev/Qt6/msvc2022_64/bin"
     },
-    // "cmake.environment": {
-    //     "QT_LIB_ROOT": "C:/Qt/Qt5.14.2/5.14.2/msvc2017_64",
-    //     "PATH": "${env:PATH};C:/Qt/Qt5.14.2/5.14.2/msvc2017_64/bin"
-    // },
     "cmake.configureSettings": {
         "CMAKE_PREFIX_PATH": "${env:QT_LIB_ROOT}",
-        "XP_PLATFORM_SUPPORT": "ON"
+        "QT_DEFAULT_MAJOR_VERSION": "6",
     },
     "cmake.options.statusBarVisibility": "visible",
     "cmake.generator": "Ninja",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 81c3ae7..8a93f00 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,11 @@ set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 set(PROJECT_URL "https://github.com/taynpg/frelay")
-set(QT_DEFAULT_MAJOR_VERSION 5)
+
+if(NOT DEFINED QT_DEFAULT_MAJOR_VERSION)
+set(QT_DEFAULT_MAJOR_VERSION 6)
+endif()
+
 set(QAPPLICATION_CLASS QApplication)
 
 if (MSVC)
@@ -20,7 +24,8 @@ endif()
 
 if(WIN32)
 if(DEFINED XP_PLATFORM_SUPPORT)
-message(STATUS "Support Windows XP platform.")
+message(STATUS "Support Windows XP platform => ${XP_PLATFORM_SUPPORT}.")
+include_directories(${CMAKE_SOURCE_DIR}/Gui/Control)
 add_definitions(-D_WIN32_WINNT=0x0501)
 else()
 add_definitions(-D_WIN32_WINNT=0x0601)
diff --git a/ClientCore/ClientCore.cpp b/ClientCore/ClientCore.cpp
index e364c1a..7448ef3 100644
--- a/ClientCore/ClientCore.cpp
+++ b/ClientCore/ClientCore.cpp
@@ -36,6 +36,10 @@ void ClientCore::DoConnect(const QString& ip, quint16 port)
 
 bool ClientCore::Connect(const QString& ip, quint16 port)
 {
+    if (connected_) {
+        qInfo() << QString(tr("already connected."));
+        return true;
+    }
     socket_->connectToHost(ip, port);
     if (!socket_->waitForConnected(3000)) {
         qCritical() << QString(tr("%1:%2 connect failed...")).arg(ip).arg(port);
diff --git a/ClientCore/ClientCore.h b/ClientCore/ClientCore.h
index 6e6d72e..811a428 100644
--- a/ClientCore/ClientCore.h
+++ b/ClientCore/ClientCore.h
@@ -26,12 +26,14 @@ public:
 
 public slots:
     bool SendFrame(QSharedPointer<FrameBuffer> frame);
+    void Disconnect();
+
+public slots:
+    void DoConnect(const QString& ip, quint16 port);
 
 public:
     void Instance();
     bool Connect(const QString& ip, quint16 port);
-    void DoConnect(const QString& ip, quint16 port);
-    void Disconnect();
     bool Send(QSharedPointer<FrameBuffer> frame);
     bool Send(const char* data, qint64 len);
     bool IsConnect();
diff --git a/Gui/Control/ConnectControl.cpp b/Gui/Control/ConnectControl.cpp
index 64f334d..b06af9c 100644
--- a/Gui/Control/ConnectControl.cpp
+++ b/Gui/Control/ConnectControl.cpp
@@ -48,7 +48,8 @@ void Connecter::RunWorker(ClientCore* clientCore)
     });
 
     connect(this, &Connecter::sigDoConnect, clientCore_, &ClientCore::DoConnect);
-    connect(this, &Connecter::sigDisConnect, clientCore_, &ClientCore::Disconnect);
+    connect(this, &Connecter::sigDisConnect, this,
+            [this]() { QMetaObject::invokeMethod(clientCore_, "Disconnect", Qt::QueuedConnection); });
     connect(sockWorker_, &QThread::finished, sockWorker_, &QObject::deleteLater);
 
     heatBeat_->start();
diff --git a/Script/xpbuild.bat b/Script/xpbuild.bat
new file mode 100644
index 0000000..d992d45
--- /dev/null
+++ b/Script/xpbuild.bat
@@ -0,0 +1,37 @@
+@echo on
+
+set QT_563_ROOT=C:\Qt\Qt5.6.3
+set QT_DIRS="%QT_563_ROOT%\5.6.3\mingw49_32"
+set QT_GCC_ROOT="%QT_563_ROOT%\Tools\mingw49_32\bin"
+
+set MINGWDLL1="%QT_563_ROOT%\Tools\mingw492_32\bin\libgcc_s_dw2-1.dll"
+set MINGWDLL2="%QT_563_ROOT%\Tools\mingw492_32\bin\libstdc++-6.dll"
+set MINGWDLL3="%QT_563_ROOT%\Tools\mingw492_32\bin\libwinpthread-1.dll"
+set QTDLL1="%QT_563_ROOT%\5.6.3\mingw49_32\bin\Qt5Core.dll"
+set QTDLL2="%QT_563_ROOT%\5.6.3\mingw49_32\bin\Qt5Gui.dll"
+set QTDLL3="%QT_563_ROOT%\5.6.3\mingw49_32\bin\Qt5Widgets.dll"
+set QTDLL4="%QT_563_ROOT%\5.6.3\mingw49_32\bin\Qt5Network.dll"
+set QTDLL5="%QT_563_ROOT%\5.6.3\mingw49_32\plugins\platforms\qwindows.dll"
+
+set PAHT=%PATH%;%QT_GCC_ROOT%;
+
+cmake -B"%~dp0..\xpbuild" -S"%~dp0.." -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=%QT_DIRS% -DQT_DEFAULT_MAJOR_VERSION=5 -DXP_PLATFORM_SUPPORT=ON
+cmake --build "%~dp0..\xpbuild" --config Release
+
+if %errorlevel% equ 0 (
+    if not exist "%~dp0..\xpbuild\bin\Release\platforms" (
+        mkdir "%~dp0..\xpbuild\bin\Release\platforms"
+    )
+    xcopy /Y %MINGWDLL1% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %MINGWDLL2% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %MINGWDLL3% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %QTDLL1% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %QTDLL2% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %QTDLL3% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %QTDLL4% "%~dp0..\xpbuild\bin\Release"
+    xcopy /Y %QTDLL5% "%~dp0..\xpbuild\bin\Release\platforms"
+    del /f /q "%~dp0..\xpbuild\bin\Release\frelayBaseTest.exe"
+    del /f /q "%~dp0..\xpbuild\bin\Release\frelayTest.exe"
+) 
+
+pause
\ No newline at end of file
diff --git a/crashelper/src/crashelper.cxx b/crashelper/src/crashelper.cxx
index c733f2f..cb3f04b 100644
--- a/crashelper/src/crashelper.cxx
+++ b/crashelper/src/crashelper.cxx
@@ -132,7 +132,7 @@ void UseExceptionHandler(EXCEPTION_POINTERS* exception)
     QString fullPath = QDir(h.dumpSavePath_).absoluteFilePath(dumpName);
     QString fullFailedPath = QDir(h.dumpSavePath_).absoluteFilePath(dumpFailedLog);
 
-    HANDLE hFile = CreateFile(fullPath.toStdString().c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    HANDLE hFile = CreateFileA(fullPath.toStdString().c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
     if (hFile == INVALID_HANDLE_VALUE) {
         QFile file(fullFailedPath);
         if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {