diff --git a/lib_fiber/c/libfiber_vc2019.vcxproj b/lib_fiber/c/libfiber_vc2019.vcxproj
index 67da4b215..1556457bc 100644
--- a/lib_fiber/c/libfiber_vc2019.vcxproj
+++ b/lib_fiber/c/libfiber_vc2019.vcxproj
@@ -428,4 +428,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/lib_fiber/samples-gui/WinFiber/WinFiberDlg.cpp b/lib_fiber/samples-gui/WinFiber/WinFiberDlg.cpp
index 037d2500c..240a2dba1 100644
--- a/lib_fiber/samples-gui/WinFiber/WinFiberDlg.cpp
+++ b/lib_fiber/samples-gui/WinFiber/WinFiberDlg.cpp
@@ -239,6 +239,7 @@ void CWinFiberDlg::OnBnClickedListen()
 		printf("listen %s ok\r\n", m_listenAddr.c_str());
 		m_fiberListen = new CFiberListener(m_listen);
 		m_fiberListen->start();
+		printf("listen fiber stopped!\r\n");
 	} else if (acl::fiber::scheduled()) {
 		GetDlgItem(IDC_LISTEN)->EnableWindow(FALSE);
 		m_fiberListen->kill();
diff --git a/lib_fiber/samples-gui/WinFiber/WinFiber_vc2019.vcxproj b/lib_fiber/samples-gui/WinFiber/WinFiber_vc2019.vcxproj
index efd3783c6..1d5e3313e 100644
--- a/lib_fiber/samples-gui/WinFiber/WinFiber_vc2019.vcxproj
+++ b/lib_fiber/samples-gui/WinFiber/WinFiber_vc2019.vcxproj
@@ -222,6 +222,7 @@
       <PreprocessorDefinitions>_WINDOWS;_DEBUG;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>..\..\..\lib_acl_cpp\include;..\..\..\lib_acl\include;..\..\..\lib_fiber\c\include;..\..\..\lib_fiber\cpp\include</AdditionalIncludeDirectories>
+      <AdditionalOptions>/Zc:__cplusplus %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -335,6 +336,7 @@
       <PreprocessorDefinitions>_WINDOWS;NDEBUG;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>..\..\..\lib_acl_cpp\include;..\..\..\lib_acl\include;..\..\..\lib_fiber\c\include;..\..\..\lib_fiber\cpp\include</AdditionalIncludeDirectories>
+      <AdditionalOptions>/Zc:__cplusplus %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>