diff --git a/wCenterWindow/Logger.cpp b/wCenterWindow/Logger.cpp
new file mode 100644
index 0000000..f777fe1
--- /dev/null
+++ b/wCenterWindow/Logger.cpp
@@ -0,0 +1,57 @@
+// Logger.cpp
+//
+#include <fstream>
+#include <filesystem>
+#include <string>
+#include <strsafe.h>
+#include <Windows.h>
+#include "Logger.h"
+
+#define TS_LEN 30
+#define PATH_LEN 1024
+
+std::wofstream logfile;
+namespace fs = std::filesystem;
+
+std::wstring GetTimeStamp() {
+	SYSTEMTIME lt;
+	GetLocalTime(&lt);
+	wchar_t ts[TS_LEN];
+	StringCchPrintf(ts, TS_LEN, L"%d-%02d-%02d %02d:%02d:%02d.%03d - ", lt.wYear, lt.wMonth, lt.wDay, lt.wHour, lt.wMinute, lt.wSecond, lt.wMilliseconds);
+	return ts;
+}
+
+void OpenLogFile() {
+	wchar_t lpszPath[PATH_LEN]{};
+	DWORD dwPathLength = GetModuleFileName(NULL, lpszPath, PATH_LEN);
+	DWORD dwError = GetLastError();
+	if (ERROR_INSUFFICIENT_BUFFER == dwError) {
+		MessageBoxW(NULL, L"Path to logfile is too long! Working without logging.", L"WARNING", MB_OK | MB_ICONWARNING);
+		return;
+	}
+	if (NULL == dwPathLength) {
+		MessageBoxW(NULL, L"Can't get module filename! Working without logging.", L"WARNING", MB_OK | MB_ICONWARNING);
+		return;
+	}
+
+	fs::path log_path = lpszPath;
+	log_path.replace_extension(L".log");
+	std::wstring logname = log_path.stem() += L".log";
+
+	logfile.open(logname);
+	if (logfile.is_open()) {
+		diag_log(L"Starting logging.");
+		diag_log(L"logfile:", logname);
+		diag_log(logname, L"successfully opened.");
+	} else {
+		MessageBoxW(NULL, L"Can't open logfile! Working without logging.", L"WARNING", MB_OK | MB_ICONWARNING);
+	}
+	return;
+}
+
+void CloseLogFile() {
+	if (logfile) {
+		diag_log(L"Ending logging.");
+		logfile.close();
+	}
+}
diff --git a/wCenterWindow/Logger.h b/wCenterWindow/Logger.h
new file mode 100644
index 0000000..0dfb6d8
--- /dev/null
+++ b/wCenterWindow/Logger.h
@@ -0,0 +1,57 @@
+#pragma once
+#include <iostream>
+#include <fstream>
+
+extern std::wofstream logfile;
+std::wstring GetTimeStamp();
+
+template <typename T1>
+void diag_log(T1 arg1) {
+	//std::wcout << GetTimeStamp() << arg1 << std::endl;
+	logfile << GetTimeStamp() << arg1 << std::endl;
+}
+
+template <typename T1, typename T2>
+void diag_log(T1 arg1, T2 arg2) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3>
+void diag_log(T1 arg1, T2 arg2, T3 arg3) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3, typename T4>
+void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3, typename T4, typename T5>
+void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
+void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
+void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << ' ' << arg7 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << ' ' << arg7 << std::endl;
+}
+
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8>
+void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8) {
+	//std::wcout << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << ' ' << arg7 << ' ' << arg8 << std::endl;
+	logfile << GetTimeStamp() << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << ' ' << arg5 << ' ' << arg6 << ' ' << arg7 << ' ' << arg8 << std::endl;
+}
+
+void OpenLogFile();
+void CloseLogFile();
diff --git a/wCenterWindow/wCenterWindow.cpp b/wCenterWindow/wCenterWindow.cpp
index 4b49f87..ea9ca9d 100644
--- a/wCenterWindow/wCenterWindow.cpp
+++ b/wCenterWindow/wCenterWindow.cpp
@@ -1,8 +1,9 @@
-// wCenterWindow, v2.2
+// wCenterWindow, v2.3
 //
 
 #include "framework.h"
 #include "wCenterWindow.h"
+#include "Logger.h"
 
 #define KEY_I 0x49
 #define KEY_C 0x43
@@ -59,11 +60,15 @@ ATOM MyRegisterClass(HINSTANCE hInstance)
 
 VOID MoveWindowToMonitorCenter(HWND hwnd, BOOL bWorkArea, BOOL bResize)
 {
+	diag_log(L"Entering MoveWindowToMonitorCenter(): hwnd =", hwnd);
+
 	RECT fgwrc;
 	GetWindowRect(hwnd, &fgwrc);
 	LONG nWidth = fgwrc.right - fgwrc.left;
 	LONG nHeight = fgwrc.bottom - fgwrc.top;
 
+	diag_log(L"Moving window from x =", fgwrc.left, L" y =", fgwrc.top, L" r =", fgwrc.right, L" b =", fgwrc.bottom);
+
 	MONITORINFO mi;
 	mi.cbSize = sizeof(MONITORINFO);
 	GetMonitorInfo(MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST), &mi);
@@ -95,6 +100,8 @@ VOID MoveWindowToMonitorCenter(HWND hwnd, BOOL bWorkArea, BOOL bResize)
 	SendMessage(hwnd, WM_ENTERSIZEMOVE, NULL, NULL);
 	MoveWindow(hwnd, x, y, nWidth, nHeight, TRUE);
 	SendMessage(hwnd, WM_EXITSIZEMOVE, NULL, NULL);
+
+	diag_log(L"Moving window to x =", x, L" y =", y, L" r =", aw, L" b =", ah);
 }
 
 
@@ -104,6 +111,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 	UNREFERENCED_PARAMETER(hPrevInstance);
 	UNREFERENCED_PARAMETER(lpCmdLine);
 
+	OpenLogFile();
+	diag_log(L"Entering WinMain()...");
+
 	hInst = hInstance;
 
 	LoadString(hInstance, IDS_APP_TITLE, szTitle, _countof(szTitle));
@@ -125,6 +135,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 
 	int nArgs = 0;
 	LPWSTR* szArglist = CommandLineToArgvW(GetCommandLineW(), &nArgs);
+
+	diag_log(L"nArgs =", nArgs, L" Args: ", *szArglist);
+
 	(nArgs >= 2 && 0 == lstrcmpiW(szArglist[1], TEXT("/hide"))) ? bShowIcon = FALSE : bShowIcon = TRUE;
 	LocalFree(szArglist);
 	HandlingTrayIcon();
@@ -155,6 +168,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 	if (hMenu) DestroyMenu(hMenu);
 	Shell_NotifyIcon(NIM_DELETE, &nid);
 
+	diag_log(L"Quiting WinMain(). msg.wParam =", (int)msg.wParam);
+	CloseLogFile();
+
 	return (int)msg.wParam;
 }
 
@@ -384,10 +400,12 @@ BOOL CheckWindow(HWND hFW)
 
 VOID HandlingTrayIcon()
 {
+	diag_log(L"Entering HandlingTrayIcon()...", L" bShowIcon=", bShowIcon);
 	if (bShowIcon)
 	{
 		if (!Shell_NotifyIcon(NIM_ADD, &nid))
 		{
+			diag_log(L"GetLastError():", GetLastError());
 			ShowError(IDS_ERR_ICON);
 			bShowIcon = FALSE;
 		}
@@ -396,6 +414,7 @@ VOID HandlingTrayIcon()
 	{
 		Shell_NotifyIcon(NIM_DELETE, &nid);
 	}
+	diag_log(L"Quiting HandlingTrayIcon()...");
 }
 
 VOID ShowError(UINT uID)
diff --git a/wCenterWindow/wCenterWindow.rc b/wCenterWindow/wCenterWindow.rc
index 5079055..f9a8fdd 100644
Binary files a/wCenterWindow/wCenterWindow.rc and b/wCenterWindow/wCenterWindow.rc differ
diff --git a/wCenterWindow/wCenterWindow.vcxproj b/wCenterWindow/wCenterWindow.vcxproj
index a35f84c..d356576 100644
--- a/wCenterWindow/wCenterWindow.vcxproj
+++ b/wCenterWindow/wCenterWindow.vcxproj
@@ -24,31 +24,32 @@
     <ProjectGuid>{f1a1603a-f5d0-47b8-8e4b-cf17747bcfba}</ProjectGuid>
     <RootNamespace>wCenterWindow</RootNamespace>
     <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+    <XPDeprecationWarning>false</XPDeprecationWarning>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v141_xp</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -88,7 +89,8 @@
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <ConformanceMode>true</ConformanceMode>
+      <ConformanceMode>false</ConformanceMode>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -108,6 +110,7 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -126,6 +129,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -140,6 +144,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -150,11 +155,13 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClInclude Include="framework.h" />
+    <ClInclude Include="Logger.h" />
     <ClInclude Include="Resource.h" />
     <ClInclude Include="targetver.h" />
     <ClInclude Include="wCenterWindow.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="Logger.cpp" />
     <ClCompile Include="wCenterWindow.cpp" />
   </ItemGroup>
   <ItemGroup>
diff --git a/wCenterWindow/wCenterWindow.vcxproj.filters b/wCenterWindow/wCenterWindow.vcxproj.filters
index 3d0c9ac..fae9a27 100644
--- a/wCenterWindow/wCenterWindow.vcxproj.filters
+++ b/wCenterWindow/wCenterWindow.vcxproj.filters
@@ -27,11 +27,17 @@
     <ClInclude Include="wCenterWindow.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="Logger.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="wCenterWindow.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="Logger.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="wCenterWindow.rc">