diff --git a/Group-Video/OpenVideoCall-Windows/Language/ChineseSimplified/ChineseSimplified.vcxproj b/Group-Video/OpenVideoCall-Windows/Language/ChineseSimplified/ChineseSimplified.vcxproj
index 794937d5..d61b487d 100644
--- a/Group-Video/OpenVideoCall-Windows/Language/ChineseSimplified/ChineseSimplified.vcxproj
+++ b/Group-Video/OpenVideoCall-Windows/Language/ChineseSimplified/ChineseSimplified.vcxproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,24 +22,25 @@
     <ProjectGuid>{898289D0-0D57-4B8E-97AE-013114F85DE9}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>ChineseSimplified</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
diff --git a/Group-Video/OpenVideoCall-Windows/Language/English/English.vcxproj b/Group-Video/OpenVideoCall-Windows/Language/English/English.vcxproj
index b0d849c1..cfcd0168 100644
--- a/Group-Video/OpenVideoCall-Windows/Language/English/English.vcxproj
+++ b/Group-Video/OpenVideoCall-Windows/Language/English/English.vcxproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,24 +22,25 @@
     <ProjectGuid>{DE1D9363-5455-4448-8D69-D22BE47F5A82}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>English</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
diff --git a/Group-Video/OpenVideoCall-Windows/OpenVideoCall/AgoraObject.cpp b/Group-Video/OpenVideoCall-Windows/OpenVideoCall/AgoraObject.cpp
index 9f2bbe3c..f3b52608 100644
--- a/Group-Video/OpenVideoCall-Windows/OpenVideoCall/AgoraObject.cpp
+++ b/Group-Video/OpenVideoCall-Windows/OpenVideoCall/AgoraObject.cpp
@@ -34,20 +34,20 @@ CString CAgoraObject::LoadAppID()
 	::GetModuleFileName(NULL, szFilePath, MAX_PATH);
 	LPTSTR lpLastSlash = _tcsrchr(szFilePath, _T('\\'));
 
-	if (lpLastSlash == NULL)
-		return strAppID;
-
-	SIZE_T nNameLen = MAX_PATH - (lpLastSlash - szFilePath + 1);
-	_tcscpy_s(lpLastSlash + 1, nNameLen, _T("AppID.ini"));
-
-	if (::GetFileAttributes(szFilePath) == INVALID_FILE_ATTRIBUTES)
-		return strAppID;
-
-	CString strResolution;
+	  if (!PathFileExists(szFilePath)) {
+        HANDLE handle = CreateFile(szFilePath, GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_NEW, 0, NULL);
+        CloseHandle(handle);
+    }
+   
+    TCHAR szAppid[MAX_PATH] = { 0 };
+    ::GetPrivateProfileString(_T("AppID"), _T("AppID"), NULL, szAppid, MAX_PATH, szFilePath);
+    if (_tcslen(szAppid) == 0) {
+        ::WritePrivateProfileString(_T("AppID"), _T("AppID"), _T(""), szFilePath);
+        ::ShellExecute(NULL, _T("open"), szFilePath, NULL, NULL, SW_MAXIMIZE);
+    }
 
-	::GetPrivateProfileString(_T("AppID"), _T("AppID"), NULL, strAppID.GetBuffer(MAX_PATH), MAX_PATH, szFilePath);
+    strAppID = szAppid;
 
-	strAppID.ReleaseBuffer();
 
 	return strAppID;
 }
diff --git a/Group-Video/OpenVideoCall-Windows/OpenVideoCall/OpenVideoCall.vcxproj b/Group-Video/OpenVideoCall-Windows/OpenVideoCall/OpenVideoCall.vcxproj
index 29c22608..0e89d180 100644
--- a/Group-Video/OpenVideoCall-Windows/OpenVideoCall/OpenVideoCall.vcxproj
+++ b/Group-Video/OpenVideoCall-Windows/OpenVideoCall/OpenVideoCall.vcxproj
@@ -27,7 +27,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
     <UseOfMfc>Static</UseOfMfc>
   </PropertyGroup>
@@ -41,7 +41,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120_xp</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
     <UseOfMfc>Static</UseOfMfc>
@@ -366,4 +366,4 @@
       <UserProperties _x007B_8856F961-340A-11D0-A96B-00C04FD705A2_x007D_="CWriteboard_video" RESOURCE_FILE="AgoraVideoCall.rc" />
     </VisualStudio>
   </ProjectExtensions>
-</Project>
+</Project>
\ No newline at end of file