diff --git a/ZRCola/ZRCola.vcxproj b/ZRCola/ZRCola.vcxproj
index 490eae0..cdba696 100644
--- a/ZRCola/ZRCola.vcxproj
+++ b/ZRCola/ZRCola.vcxproj
@@ -115,6 +115,9 @@
     <ProjectReference Include="..\lib\libZRCola\build\libZRCola.vcxproj">
       <Project>{3c61929e-7289-4101-8d0a-da22d6e1aea8}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\lib\WinStd\build\WinStd.vcxproj">
+      <Project>{47399d91-7eb9-41de-b521-514ba5db0c43}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\lib\wxExtend\build\wxExtendDll.vcxproj">
       <Project>{a3a36689-ac35-4026-93da-a3ba0c0e767c}</Project>
     </ProjectReference>
diff --git a/ZRCola/zrcolaapp.cpp b/ZRCola/zrcolaapp.cpp
index 552787c..83e8133 100644
--- a/ZRCola/zrcolaapp.cpp
+++ b/ZRCola/zrcolaapp.cpp
@@ -32,9 +32,6 @@ wxIMPLEMENT_APP(ZRColaApp);
 
 ZRColaApp::ZRColaApp() :
     m_mainWnd(NULL),
-#ifdef __WXMSW__
-    m_running(NULL),
-#endif
     wxApp()
 {
 }
@@ -68,8 +65,7 @@ bool ZRColaApp::OnInit()
 
 #ifdef __WXMSW__
     // Create global event.
-    m_running = ::CreateEvent(NULL, FALSE, FALSE, _T(ZRCOLA_CFG_APPLICATION) _T("{BBDE7AAD-29B6-4B83-ADA1-92AFA81A0883}"));
-    wxASSERT(m_running);
+    m_running.attach(::CreateEvent(NULL, FALSE, FALSE, _T(ZRCOLA_CFG_APPLICATION) _T("{BBDE7AAD-29B6-4B83-ADA1-92AFA81A0883}")));
     if (::GetLastError() == ERROR_ALREADY_EXISTS) {
         // ZRCola is already running. Find its window.
         HWND okno = ::FindWindow(_T("wxWindowNR"), _("ZRCola"));
@@ -176,10 +172,7 @@ int ZRColaApp::OnExit()
     int res = wxApp::OnExit();
 
 #ifdef __WXMSW__
-    if (m_running) {
-        wxVERIFY(::CloseHandle(m_running));
-        m_running = NULL;
-    }
+    m_running.free();
 #endif
 
     return res;
diff --git a/ZRCola/zrcolaapp.h b/ZRCola/zrcolaapp.h
index afd9249..294cc40 100644
--- a/ZRCola/zrcolaapp.h
+++ b/ZRCola/zrcolaapp.h
@@ -26,6 +26,7 @@ class ZRColaApp;
 #pragma once
 
 #include "zrcolafrm.h"
+#include <WinStd/Win.h>
 #include <wx/app.h>
 #include <wx/config.h>
 #include <wx/intl.h>
@@ -83,7 +84,7 @@ public:
 
 protected:
 #ifdef __WXMSW__
-    HANDLE m_running;               ///< Global Win32 event to determine if another instance of ZRCola is already running
+    winstd::win_handle m_running;   ///< Global Win32 event to determine if another instance of ZRCola is already running
 #endif
 };