diff --git a/src/chrome++.cpp b/src/chrome++.cpp
index 1224f96..914f0e2 100644
--- a/src/chrome++.cpp
+++ b/src/chrome++.cpp
@@ -21,7 +21,7 @@ HMODULE hInstance;
 #include "green.h"
 
 typedef int (*Startup)();
-Startup ExeMain = NULL;
+Startup ExeMain = nullptr;
 
 void ChromePlus() {
   // Shortcut.
@@ -66,7 +66,7 @@ int Loader() {
 void InstallLoader() {
   // Get the address of the original entry point of the main module.
   MODULEINFO mi;
-  GetModuleInformation(GetCurrentProcess(), GetModuleHandle(NULL), &mi,
+  GetModuleInformation(GetCurrentProcess(), GetModuleHandle(nullptr), &mi,
                        sizeof(MODULEINFO));
   PBYTE entry = (PBYTE)mi.EntryPoint;
 
diff --git a/src/fastsearch.h b/src/fastsearch.h
index 7e973cb..6af3e30 100644
--- a/src/fastsearch.h
+++ b/src/fastsearch.h
@@ -5,13 +5,13 @@
 
 static const uint8_t* ForceSearch(const uint8_t* s, int n, const uint8_t* p) {
   int i;
-  for (i = 0; i < n; i++) {
+  for (i = 0; i < n; ++i) {
     if (*(s + i) == *p) {
       return s + i;
     }
   }
 
-  return NULL;
+  return nullptr;
 }
 
 static const uint8_t* SundaySearch(const uint8_t* s,
@@ -22,11 +22,11 @@ static const uint8_t* SundaySearch(const uint8_t* s,
 
   size_t skip[256];
 
-  for (i = 0; i < 256; i++) {
+  for (i = 0; i < 256; ++i) {
     skip[i] = m + 1;
   }
 
-  for (i = 0; i < m; i++) {
+  for (i = 0; i < m; ++i) {
     skip[p[i]] = m - i;
   }
 
@@ -34,7 +34,7 @@ static const uint8_t* SundaySearch(const uint8_t* s,
   while (i <= n - m) {
     j = 0;
     while (s[i + j] == p[j]) {
-      j++;
+      ++j;
       if (j >= m) {
         return s + i;
       }
@@ -43,12 +43,12 @@ static const uint8_t* SundaySearch(const uint8_t* s,
     i += (int)skip[s[i + m]];
   }
 
-  return NULL;
+  return nullptr;
 }
 
 const uint8_t* FastSearch(const uint8_t* s, int n, const uint8_t* p, int m) {
   if (!s || !p || n < m)
-    return NULL;
+    return nullptr;
 
   if (m == 0) {
     return s;
diff --git a/src/green.h b/src/green.h
index 9adedbb..10afff1 100644
--- a/src/green.h
+++ b/src/green.h
@@ -5,7 +5,7 @@
 
 BOOL WINAPI FakeGetComputerName(_Out_ LPTSTR lpBuffer,
                                 _Inout_ LPDWORD lpnSize) {
-  return 0;
+  return false;
 }
 
 BOOL WINAPI FakeGetVolumeInformation(_In_opt_ LPCTSTR lpRootPathName,
@@ -16,7 +16,7 @@ BOOL WINAPI FakeGetVolumeInformation(_In_opt_ LPCTSTR lpRootPathName,
                                      _Out_opt_ LPDWORD lpFileSystemFlags,
                                      _Out_opt_ LPTSTR lpFileSystemNameBuffer,
                                      _In_ DWORD nFileSystemNameSize) {
-  return 0;
+  return false;
 }
 
 BOOL WINAPI
@@ -42,7 +42,7 @@ typedef BOOL(WINAPI* pCryptUnprotectData)(
     _In_ DWORD dwFlags,
     _Out_ DATA_BLOB* pDataOut);
 
-pCryptUnprotectData RawCryptUnprotectData = NULL;
+pCryptUnprotectData RawCryptUnprotectData = nullptr;
 
 BOOL WINAPI
 MyCryptUnprotectData(_In_ DATA_BLOB* pDataIn,
@@ -70,7 +70,7 @@ typedef DWORD(WINAPI* pLogonUserW)(LPCWSTR lpszUsername,
                                    DWORD dwLogonProvider,
                                    PHANDLE phToken);
 
-pLogonUserW RawLogonUserW = NULL;
+pLogonUserW RawLogonUserW = nullptr;
 
 DWORD WINAPI MyLogonUserW(LPCWSTR lpszUsername,
                           LPCWSTR lpszDomain,
@@ -87,7 +87,7 @@ DWORD WINAPI MyLogonUserW(LPCWSTR lpszUsername,
 
 typedef BOOL(WINAPI* pIsOS)(DWORD dwOS);
 
-pIsOS RawIsOS = NULL;
+pIsOS RawIsOS = nullptr;
 
 BOOL WINAPI MyIsOS(DWORD dwOS) {
   DWORD ret = RawIsOS(dwOS);
@@ -103,7 +103,7 @@ typedef NET_API_STATUS(WINAPI* pNetUserGetInfo)(LPCWSTR servername,
                                                 DWORD level,
                                                 LPBYTE* bufptr);
 
-pNetUserGetInfo RawNetUserGetInfo = NULL;
+pNetUserGetInfo RawNetUserGetInfo = nullptr;
 
 NET_API_STATUS WINAPI MyNetUserGetInfo(LPCWSTR servername,
                                        LPCWSTR username,
@@ -170,14 +170,14 @@ void MakeGreen() {
         (PBYTE)GetProcAddress(kernel32, "GetVolumeInformationW");
 
     MH_STATUS status =
-        MH_CreateHook(GetComputerNameW, FakeGetComputerName, NULL);
+        MH_CreateHook(GetComputerNameW, FakeGetComputerName, nullptr);
     if (status == MH_OK) {
       MH_EnableHook(GetComputerNameW);
     } else {
       DebugLog(L"MH_CreateHook GetComputerNameW failed:%d", status);
     }
     status =
-        MH_CreateHook(GetVolumeInformationW, FakeGetVolumeInformation, NULL);
+        MH_CreateHook(GetVolumeInformationW, FakeGetVolumeInformation, nullptr);
     if (status == MH_OK) {
       MH_EnableHook(GetVolumeInformationW);
     } else {
@@ -193,7 +193,7 @@ void MakeGreen() {
         (PBYTE)GetProcAddress(Crypt32, "CryptUnprotectData");
 
     MH_STATUS status =
-        MH_CreateHook(CryptProtectData, MyCryptProtectData, NULL);
+        MH_CreateHook(CryptProtectData, MyCryptProtectData, nullptr);
     if (status == MH_OK) {
       MH_EnableHook(CryptProtectData);
     } else {
diff --git a/src/hijack.h b/src/hijack.h
index 802f5bc..fb7cd21 100644
--- a/src/hijack.h
+++ b/src/hijack.h
@@ -109,7 +109,7 @@ bool WriteMemory(PBYTE BaseAddress, PBYTE Buffer, DWORD nSize) {
 // Restore the export function.
 void InstallJMP(PBYTE BaseAddress, uintptr_t Function) {
   if (*BaseAddress == 0xE9) {
-    BaseAddress++;
+    ++BaseAddress;
     BaseAddress = BaseAddress + *(uint32_t*)BaseAddress + 4;
   }
 #ifdef _WIN64
@@ -159,7 +159,7 @@ void LoadVersion(HINSTANCE hModule) {
       lstrcat(szDLLPath, TEXT("\\version.dll"));
 
       HINSTANCE module = LoadLibrary(szDLLPath);
-      for (size_t i = 0; i < pimExD->NumberOfNames; i++) {
+      for (size_t i = 0; i < pimExD->NumberOfNames; ++i) {
         uintptr_t Original =
             (uintptr_t)GetProcAddress(module, (char*)(pImageBase + pName[i]));
         if (Original) {
diff --git a/src/hotkey.h b/src/hotkey.h
index 2f41158..248e5f9 100644
--- a/src/hotkey.h
+++ b/src/hotkey.h
@@ -83,7 +83,7 @@ void HideAndShow() {
     EnumWindows(SearchChromeWindow, 0);
   } else {
     for (auto r_iter = hwnd_list.rbegin(); r_iter != hwnd_list.rend();
-         r_iter++) {
+         ++r_iter) {
       ShowWindow(*r_iter, SW_SHOW);
     }
     hwnd_list.clear();
@@ -110,10 +110,10 @@ void Hotkey(const std::wstring& keys, HotkeyAction action) {
     UINT flag = ParseHotkeys(keys.c_str());
 
     std::thread th([flag, action]() {
-      RegisterHotKey(NULL, 0, LOWORD(flag), HIWORD(flag));
+      RegisterHotKey(nullptr, 0, LOWORD(flag), HIWORD(flag));
 
       MSG msg;
-      while (GetMessage(&msg, NULL, 0, 0)) {
+      while (GetMessage(&msg, nullptr, 0, 0)) {
         if (msg.message == WM_HOTKEY) {
           OnHotkey(action);
         }
diff --git a/src/iaccessible.h b/src/iaccessible.h
index f4b0055..c40b96e 100644
--- a/src/iaccessible.h
+++ b/src/iaccessible.h
@@ -290,7 +290,7 @@ NodePtr FindChildElement(NodePtr parent, long role, int skipcount = 0) {
                             if (i == skipcount) {
                               element = child;
                             }
-                            i++;
+                            ++i;
                           }
                           return element != nullptr;
                         });
diff --git a/src/pakfile.h b/src/pakfile.h
index 93f1d7b..cdaca64 100644
--- a/src/pakfile.h
+++ b/src/pakfile.h
@@ -75,8 +75,8 @@ bool CheckHeader(uint8_t* buffer,
 
 template <typename Function>
 void PakFind(uint8_t* buffer, uint8_t* pos, Function f) {
-  PAK_ENTRY* pak_entry = NULL;
-  PAK_ENTRY* end_entry = NULL;
+  PAK_ENTRY* pak_entry = nullptr;
+  PAK_ENTRY* end_entry = nullptr;
 
   // Check the file header.
   if (!CheckHeader(buffer, pak_entry, end_entry))
diff --git a/src/pakpatch.h b/src/pakpatch.h
index 587796f..3e26d35 100644
--- a/src/pakpatch.h
+++ b/src/pakpatch.h
@@ -5,7 +5,7 @@
 
 DWORD resources_pak_size = 0;
 
-HANDLE resources_pak_map = NULL;
+HANDLE resources_pak_map = nullptr;
 
 typedef HANDLE(WINAPI* pMapViewOfFile)(_In_ HANDLE hFileMappingObject,
                                        _In_ DWORD dwDesiredAccess,
@@ -13,7 +13,7 @@ typedef HANDLE(WINAPI* pMapViewOfFile)(_In_ HANDLE hFileMappingObject,
                                        _In_ DWORD dwFileOffsetLow,
                                        _In_ SIZE_T dwNumberOfBytesToMap);
 
-pMapViewOfFile RawMapViewOfFile = NULL;
+pMapViewOfFile RawMapViewOfFile = nullptr;
 
 HANDLE WINAPI MyMapViewOfFile(_In_ HANDLE hFileMappingObject,
                               _In_ DWORD dwDesiredAccess,
@@ -27,7 +27,7 @@ HANDLE WINAPI MyMapViewOfFile(_In_ HANDLE hFileMappingObject,
                          dwFileOffsetLow, dwNumberOfBytesToMap);
 
     // No more hook needed.
-    resources_pak_map = NULL;
+    resources_pak_map = nullptr;
     MH_DisableHook(MapViewOfFile);
 
     if (buffer) {
@@ -79,7 +79,7 @@ HANDLE WINAPI MyMapViewOfFile(_In_ HANDLE hFileMappingObject,
                           dwFileOffsetLow, dwNumberOfBytesToMap);
 }
 
-HANDLE resources_pak_file = NULL;
+HANDLE resources_pak_file = nullptr;
 
 typedef HANDLE(WINAPI* pCreateFileMapping)(_In_ HANDLE hFile,
                                            _In_opt_ LPSECURITY_ATTRIBUTES
@@ -89,7 +89,7 @@ typedef HANDLE(WINAPI* pCreateFileMapping)(_In_ HANDLE hFile,
                                            _In_ DWORD dwMaximumSizeLow,
                                            _In_opt_ LPCTSTR lpName);
 
-pCreateFileMapping RawCreateFileMapping = NULL;
+pCreateFileMapping RawCreateFileMapping = nullptr;
 
 HANDLE WINAPI MyCreateFileMapping(_In_ HANDLE hFile,
                                   _In_opt_ LPSECURITY_ATTRIBUTES lpAttributes,
@@ -104,7 +104,7 @@ HANDLE WINAPI MyCreateFileMapping(_In_ HANDLE hFile,
                              dwMaximumSizeHigh, dwMaximumSizeLow, lpName);
 
     // No more hook needed.
-    resources_pak_file = NULL;
+    resources_pak_file = nullptr;
     MH_DisableHook(CreateFileMappingW);
 
     if (MH_CreateHook(MapViewOfFile, MyMapViewOfFile,
@@ -127,7 +127,7 @@ typedef HANDLE(WINAPI* pCreateFile)(_In_ LPCTSTR lpFileName,
                                     _In_ DWORD dwFlagsAndAttributes,
                                     _In_opt_ HANDLE hTemplateFile);
 
-pCreateFile RawCreateFile = NULL;
+pCreateFile RawCreateFile = nullptr;
 
 HANDLE WINAPI MyCreateFile(_In_ LPCTSTR lpFileName,
                            _In_ DWORD dwDesiredAccess,
@@ -142,7 +142,7 @@ HANDLE WINAPI MyCreateFile(_In_ LPCTSTR lpFileName,
 
   if (isEndWith(lpFileName, L"resources.pak")) {
     resources_pak_file = file;
-    resources_pak_size = GetFileSize(resources_pak_file, NULL);
+    resources_pak_size = GetFileSize(resources_pak_file, nullptr);
 
     if (MH_CreateHook(CreateFileMappingW, MyCreateFileMapping,
                       (LPVOID*)&RawCreateFileMapping) == MH_OK) {
diff --git a/src/portable.h b/src/portable.h
index 16b8110..8d605b7 100644
--- a/src/portable.h
+++ b/src/portable.h
@@ -37,7 +37,7 @@ std::wstring GetCommand(LPWSTR param) {
   LPWSTR* argv = CommandLineToArgvW(param, &argc);
 
   int insert_pos = 0;
-  for (int i = 0; i < argc; i++) {
+  for (int i = 0; i < argc; ++i) {
     if (std::wstring(argv[i]).find(L"--") != std::wstring::npos ||
         std::wstring(argv[i]).find(L"--single-argument") !=
             std::wstring::npos) {
@@ -45,7 +45,7 @@ std::wstring GetCommand(LPWSTR param) {
     }
     insert_pos = i;
   }
-  for (int i = 0; i < argc; i++) {
+  for (int i = 0; i < argc; ++i) {
     // Preserve former arguments.
     if (i)
       args.push_back(argv[i]);
@@ -97,7 +97,7 @@ std::wstring GetCommand(LPWSTR param) {
 
 void Portable(LPWSTR param) {
   wchar_t path[MAX_PATH];
-  ::GetModuleFileName(NULL, path, MAX_PATH);
+  ::GetModuleFileName(nullptr, path, MAX_PATH);
 
   std::wstring args = GetCommand(param);
 
diff --git a/src/utils.h b/src/utils.h
index a726822..d985c21 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -184,7 +184,7 @@ uint8_t* SearchModuleRaw(HMODULE module, const uint8_t* sub, int m) {
                               sizeof(IMAGE_FILE_HEADER) +
                               nt_header->FileHeader.SizeOfOptionalHeader);
 
-  for (int i = 0; i < nt_header->FileHeader.NumberOfSections; i++) {
+  for (int i = 0; i < nt_header->FileHeader.NumberOfSections; ++i) {
     if (strcmp((const char*)section[i].Name, ".text") == 0) {
       return memmem(buffer + section[i].PointerToRawData,
                     section[i].SizeOfRawData, sub, m);
@@ -204,7 +204,7 @@ uint8_t* SearchModuleRaw2(HMODULE module, const uint8_t* sub, int m) {
                               sizeof(IMAGE_FILE_HEADER) +
                               nt_header->FileHeader.SizeOfOptionalHeader);
 
-  for (int i = 0; i < nt_header->FileHeader.NumberOfSections; i++) {
+  for (int i = 0; i < nt_header->FileHeader.NumberOfSections; ++i) {
     if (strcmp((const char*)section[i].Name, ".rdata") == 0) {
       return memmem(buffer + section[i].PointerToRawData,
                     section[i].SizeOfRawData, sub, m);