diff --git a/src/corelib/io/qfsfileengine_win.cpp b/src/corelib/io/qfsfileengine_win.cpp
index c975bd1dce..e80365f5c8 100644
--- a/src/corelib/io/qfsfileengine_win.cpp
+++ b/src/corelib/io/qfsfileengine_win.cpp
@@ -121,7 +121,7 @@ bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
     if (openMode & QIODevice::WriteOnly)
         accessRights |= GENERIC_WRITE;
 
-    SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, false };
+    SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
 
     // WriteOnly can create files, ReadOnly cannot.
     DWORD creationDisp = (openMode & QIODevice::WriteOnly) ? OPEN_ALWAYS : OPEN_EXISTING;
@@ -639,7 +639,7 @@ bool QFSFileEngine::link(const QString &newName)
                 IPersistFile *ppf;
                 hres = psl->QueryInterface(IID_IPersistFile, (void **)&ppf);
                 if (SUCCEEDED(hres)) {
-                    hres = ppf->Save((wchar_t*)linkName.utf16(), true);
+                    hres = ppf->Save((wchar_t*)linkName.utf16(), TRUE);
                     if (SUCCEEDED(hres))
                          ret = true;
                     ppf->Release();
diff --git a/src/corelib/io/qprocess_win.cpp b/src/corelib/io/qprocess_win.cpp
index 36346b6be7..f4469d670c 100644
--- a/src/corelib/io/qprocess_win.cpp
+++ b/src/corelib/io/qprocess_win.cpp
@@ -135,7 +135,7 @@ static void duplicateStdWriteChannel(Q_PIPE *pipe, DWORD nStdHandle)
     HANDLE hStdWriteChannel = GetStdHandle(nStdHandle);
     HANDLE hCurrentProcess = GetCurrentProcess();
     DuplicateHandle(hCurrentProcess, hStdWriteChannel, hCurrentProcess,
-                    &pipe[1], 0, true, DUPLICATE_SAME_ACCESS);
+                    &pipe[1], 0, TRUE, DUPLICATE_SAME_ACCESS);
 }
 
 /*
@@ -149,7 +149,7 @@ bool QProcessPrivate::createChannel(Channel &channel)
 
     if (&channel == &stderrChannel && processChannelMode == QProcess::MergedChannels) {
         return DuplicateHandle(GetCurrentProcess(), stdoutChannel.pipe[1], GetCurrentProcess(),
-                               &stderrChannel.pipe[1], 0, true, DUPLICATE_SAME_ACCESS);
+                               &stderrChannel.pipe[1], 0, TRUE, DUPLICATE_SAME_ACCESS);
     }
 
     if (channel.type == Channel::Normal) {
@@ -182,7 +182,7 @@ bool QProcessPrivate::createChannel(Channel &channel)
         return true;
     } else if (channel.type == Channel::Redirect) {
         // we're redirecting the channel to/from a file
-        SECURITY_ATTRIBUTES secAtt = { sizeof(SECURITY_ATTRIBUTES), NULL, true };
+        SECURITY_ATTRIBUTES secAtt = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
 
         if (&channel == &stdinChannel) {
             // try to open in read-only mode
@@ -244,7 +244,7 @@ bool QProcessPrivate::createChannel(Channel &channel)
                 HANDLE tmpHandle = source->pipe[1];
                 if (!DuplicateHandle(GetCurrentProcess(), tmpHandle,
                                      GetCurrentProcess(), &source->pipe[1],
-                                     0, true, DUPLICATE_SAME_ACCESS))
+                                     0, TRUE, DUPLICATE_SAME_ACCESS))
                     return false;
 
                 CloseHandle(tmpHandle);
@@ -270,7 +270,7 @@ bool QProcessPrivate::createChannel(Channel &channel)
                 HANDLE tmpHandle = sink->pipe[0];
                 if (!DuplicateHandle(GetCurrentProcess(), tmpHandle,
                                      GetCurrentProcess(), &sink->pipe[0],
-                                     0, true, DUPLICATE_SAME_ACCESS))
+                                     0, TRUE, DUPLICATE_SAME_ACCESS))
                     return false;
 
                 CloseHandle(tmpHandle);
@@ -484,7 +484,7 @@ void QProcessPrivate::startProcess()
                                  stdinChannel.pipe[0], stdoutChannel.pipe[1], stderrChannel.pipe[1]
     };
     success = CreateProcess(0, (wchar_t*)args.utf16(),
-                            0, 0, true, dwCreationFlags,
+                            0, 0, TRUE, dwCreationFlags,
                             environment.isEmpty() ? 0 : envlist.data(),
                             workingDirectory.isEmpty() ? 0 : (wchar_t*)QDir::toNativeSeparators(workingDirectory).utf16(),
                             &startupInfo, pid);
@@ -585,7 +585,7 @@ static BOOL QT_WIN_CALLBACK qt_terminateApp(HWND hwnd, LPARAM procId)
     if (currentProcId == (DWORD)procId)
 	    PostMessage(hwnd, WM_CLOSE, 0, 0);
 
-    return true;
+    return TRUE;
 }
 
 void QProcessPrivate::terminateProcess()
@@ -853,7 +853,7 @@ bool QProcessPrivate::startDetached(const QString &program, const QStringList &a
                                  0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                                };
     success = CreateProcess(0, (wchar_t*)args.utf16(),
-                            0, 0, false, CREATE_UNICODE_ENVIRONMENT | CREATE_NEW_CONSOLE, 0,
+                            0, 0, FALSE, CREATE_UNICODE_ENVIRONMENT | CREATE_NEW_CONSOLE, 0,
                             workingDir.isEmpty() ? 0 : (wchar_t*)workingDir.utf16(),
                             &startupInfo, &pinfo);
 
diff --git a/src/corelib/io/qstandardpaths_win.cpp b/src/corelib/io/qstandardpaths_win.cpp
index 53d328b664..f918e02880 100644
--- a/src/corelib/io/qstandardpaths_win.cpp
+++ b/src/corelib/io/qstandardpaths_win.cpp
@@ -100,9 +100,9 @@ QString QStandardPaths::writableLocation(StandardLocation type)
     case DataLocation:
     case GenericDataLocation:
 #if defined Q_OS_WINCE
-        if (SHGetSpecialFolderPath(0, path, CSIDL_APPDATA, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_APPDATA, FALSE))
 #else
-        if (SHGetSpecialFolderPath(0, path, CSIDL_LOCAL_APPDATA, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_LOCAL_APPDATA, FALSE))
 #endif
             result = convertCharArray(path);
         if (isTestModeEnabled())
@@ -116,38 +116,38 @@ QString QStandardPaths::writableLocation(StandardLocation type)
         break;
 
     case DesktopLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_DESKTOPDIRECTORY, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_DESKTOPDIRECTORY, FALSE))
             result = convertCharArray(path);
         break;
 
     case DownloadLocation: // TODO implement with SHGetKnownFolderPath(FOLDERID_Downloads) (starting from Vista)
     case DocumentsLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_PERSONAL, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_PERSONAL, FALSE))
             result = convertCharArray(path);
         break;
 
     case FontsLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_FONTS, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_FONTS, FALSE))
             result = convertCharArray(path);
         break;
 
     case ApplicationsLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_PROGRAMS, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_PROGRAMS, FALSE))
             result = convertCharArray(path);
         break;
 
     case MusicLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_MYMUSIC, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_MYMUSIC, FALSE))
             result = convertCharArray(path);
         break;
 
     case MoviesLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_MYVIDEO, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_MYVIDEO, FALSE))
             result = convertCharArray(path);
         break;
 
     case PicturesLocation:
-        if (SHGetSpecialFolderPath(0, path, CSIDL_MYPICTURES, false))
+        if (SHGetSpecialFolderPath(0, path, CSIDL_MYPICTURES, FALSE))
             result = convertCharArray(path);
         break;
 
@@ -186,7 +186,7 @@ QStringList QStandardPaths::standardLocations(StandardLocation type)
         case ConfigLocation: // same as DataLocation, on Windows
         case DataLocation:
         case GenericDataLocation:
-            if (SHGetSpecialFolderPath(0, path, CSIDL_COMMON_APPDATA, false)) {
+            if (SHGetSpecialFolderPath(0, path, CSIDL_COMMON_APPDATA, FALSE)) {
                 QString result = convertCharArray(path);
                 if (type != GenericDataLocation) {
                     if (!QCoreApplication::organizationName().isEmpty())
diff --git a/src/corelib/io/qwindowspipewriter.cpp b/src/corelib/io/qwindowspipewriter.cpp
index a7ed002b1e..aa3745237b 100644
--- a/src/corelib/io/qwindowspipewriter.cpp
+++ b/src/corelib/io/qwindowspipewriter.cpp
@@ -54,7 +54,7 @@ QWindowsPipeWriter::QWindowsPipeWriter(HANDLE pipe, QObject * parent)
 {
 #if !defined(Q_OS_WINCE) || (_WIN32_WCE >= 0x600)
     DuplicateHandle(GetCurrentProcess(), pipe, GetCurrentProcess(),
-                         &writePipe, 0, false, DUPLICATE_SAME_ACCESS);
+                         &writePipe, 0, FALSE, DUPLICATE_SAME_ACCESS);
 #else
     Q_UNUSED(pipe);
     writePipe = GetCurrentProcess();
@@ -103,7 +103,7 @@ void QWindowsPipeWriter::run()
 {
     OVERLAPPED overl;
     memset(&overl, 0, sizeof overl);
-    overl.hEvent = CreateEvent(NULL, true, false, NULL);
+    overl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
     forever {
         lock.lock();
         while(data.isEmpty() && (!quitNow)) {
@@ -138,7 +138,7 @@ void QWindowsPipeWriter::run()
                 }
 #ifndef Q_OS_WINCE
                 if (GetLastError() == ERROR_IO_PENDING) {
-                  if (!GetOverlappedResult(writePipe, &overl, &written, true)) {
+                  if (!GetOverlappedResult(writePipe, &overl, &written, TRUE)) {
                       CloseHandle(overl.hEvent);
                       return;
                   }
diff --git a/src/corelib/io/qwinoverlappedionotifier.cpp b/src/corelib/io/qwinoverlappedionotifier.cpp
index 3ffc20ebf1..65f85a2d16 100644
--- a/src/corelib/io/qwinoverlappedionotifier.cpp
+++ b/src/corelib/io/qwinoverlappedionotifier.cpp
@@ -168,7 +168,7 @@ QWinOverlappedIoNotifier::QWinOverlappedIoNotifier(QObject *parent)
       lastNumberOfBytes(0),
       lastErrorCode(ERROR_SUCCESS)
 {
-    hEvent = CreateEvent(NULL, true, false, NULL);
+    hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
     connect(this, &QWinOverlappedIoNotifier::_q_notify,
             this, &QWinOverlappedIoNotifier::_q_notified, Qt::QueuedConnection);
 }
diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp
index 240c25d085..46cf4445b5 100644
--- a/src/corelib/kernel/qeventdispatcher_win.cpp
+++ b/src/corelib/kernel/qeventdispatcher_win.cpp
@@ -1001,7 +1001,7 @@ void QEventDispatcherWin32::activateEventNotifiers()
     //### this could break if events are removed/added in the activation
     for (int i=0; i<d->winEventNotifierList.count(); i++) {
 #if !defined(Q_OS_WINCE)
-        if (WaitForSingleObjectEx(d->winEventNotifierList.at(i)->handle(), 0, true) == WAIT_OBJECT_0)
+        if (WaitForSingleObjectEx(d->winEventNotifierList.at(i)->handle(), 0, TRUE) == WAIT_OBJECT_0)
             d->activateEventNotifier(d->winEventNotifierList.at(i));
 #else
         if (WaitForSingleObject(d->winEventNotifierList.at(i)->handle(), 0) == WAIT_OBJECT_0)
diff --git a/src/corelib/thread/qmutex_win.cpp b/src/corelib/thread/qmutex_win.cpp
index b0008af750..0e06c6a26e 100644
--- a/src/corelib/thread/qmutex_win.cpp
+++ b/src/corelib/thread/qmutex_win.cpp
@@ -48,7 +48,7 @@ QT_BEGIN_NAMESPACE
 
 QMutexPrivate::QMutexPrivate()
 {
-    event = CreateEvent(0, false, false, 0);
+    event = CreateEvent(0, FALSE, FALSE, 0);
     if (!event)
         qWarning("QMutexData::QMutexData: Cannot create event");
 }
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index f2713f6b8b..3566cace61 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -127,7 +127,7 @@ QThreadData *QThreadData::current()
                     GetCurrentProcess(),
                     &realHandle,
                     0,
-                    false,
+                    FALSE,
                     DUPLICATE_SAME_ACCESS);
 #else
                         realHandle = (HANDLE)GetCurrentThreadId();
diff --git a/src/corelib/thread/qwaitcondition_win.cpp b/src/corelib/thread/qwaitcondition_win.cpp
index 94878736bb..3528d6a0ff 100644
--- a/src/corelib/thread/qwaitcondition_win.cpp
+++ b/src/corelib/thread/qwaitcondition_win.cpp
@@ -64,7 +64,7 @@ class QWaitConditionEvent
 public:
     inline QWaitConditionEvent() : priority(0), wokenUp(false)
     {
-        event = CreateEvent(NULL, true, false, NULL);
+        event = CreateEvent(NULL, TRUE, FALSE, NULL);
     }
     inline ~QWaitConditionEvent() { CloseHandle(event); }
     int priority;
diff --git a/src/network/socket/qlocalserver_win.cpp b/src/network/socket/qlocalserver_win.cpp
index ba879f4eb0..3304c6c6a0 100644
--- a/src/network/socket/qlocalserver_win.cpp
+++ b/src/network/socket/qlocalserver_win.cpp
@@ -69,7 +69,7 @@ bool QLocalServerPrivate::addListener()
 
     SECURITY_ATTRIBUTES sa;
     sa.nLength = sizeof(SECURITY_ATTRIBUTES);
-    sa.bInheritHandle = false;      //non inheritable handle, same as default
+    sa.bInheritHandle = FALSE;      //non inheritable handle, same as default
     sa.lpSecurityDescriptor = 0;    //default security descriptor
 
     QScopedPointer<SECURITY_DESCRIPTOR> pSD;
@@ -166,9 +166,9 @@ bool QLocalServerPrivate::addListener()
                 return false;
             }
         }
-        SetSecurityDescriptorOwner(pSD.data(), pTokenUser->User.Sid, false);
-        SetSecurityDescriptorGroup(pSD.data(), pTokenGroup->PrimaryGroup, false);
-        if (!SetSecurityDescriptorDacl(pSD.data(), false, acl, false)) {
+        SetSecurityDescriptorOwner(pSD.data(), pTokenUser->User.Sid, FALSE);
+        SetSecurityDescriptorGroup(pSD.data(), pTokenGroup->PrimaryGroup, FALSE);
+        if (!SetSecurityDescriptorDacl(pSD.data(), TRUE, acl, FALSE)) {
             setError(QLatin1String("QLocalServerPrivate::addListener"));
             FreeSid(worldSID);
             return false;
@@ -252,7 +252,7 @@ bool QLocalServerPrivate::listen(const QString &name)
     // Use only one event for all listeners of one socket.
     // The idea is that listener events are rare, so polling all listeners once in a while is
     // cheap compared to waiting for N additional events in each iteration of the main loop.
-    eventHandle = CreateEvent(NULL, true, false, NULL);
+    eventHandle = CreateEvent(NULL, TRUE, FALSE, NULL);
     connectionEventNotifier = new QWinEventNotifier(eventHandle , q);
     q->connect(connectionEventNotifier, SIGNAL(activated(HANDLE)), q, SLOT(_q_onNewConnection()));
 
@@ -282,7 +282,7 @@ void QLocalServerPrivate::_q_onNewConnection()
     for (int i = 0; i < listeners.size(); ) {
         HANDLE handle = listeners[i].handle;
         if (listeners[i].connected
-            || GetOverlappedResult(handle, &listeners[i].overlapped, &dummy, false))
+            || GetOverlappedResult(handle, &listeners[i].overlapped, &dummy, FALSE))
         {
             listeners.removeAt(i);
 
diff --git a/src/plugins/platforms/windows/qwindowsglcontext.cpp b/src/plugins/platforms/windows/qwindowsglcontext.cpp
index 576aa920b4..dcc3725708 100644
--- a/src/plugins/platforms/windows/qwindowsglcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsglcontext.cpp
@@ -377,9 +377,9 @@ static int choosePixelFormat(HDC hdc,
     iAttributes[i++] = testFlag(additional.formatFlags, QWindowsGLDirectRendering) ?
                        WGL_FULL_ACCELERATION_ARB : WGL_NO_ACCELERATION_ARB;
     iAttributes[i++] = WGL_SUPPORT_OPENGL_ARB;
-    iAttributes[i++] = true;
+    iAttributes[i++] = TRUE;
     iAttributes[i++] = WGL_DRAW_TO_WINDOW_ARB;
-    iAttributes[i++] = true;
+    iAttributes[i++] = TRUE;
     iAttributes[i++] = WGL_COLOR_BITS_ARB;
     iAttributes[i++] = 24;
     switch (format.swapBehavior()) {
@@ -387,17 +387,17 @@ static int choosePixelFormat(HDC hdc,
         break;
     case QSurfaceFormat::SingleBuffer:
         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
-        iAttributes[i++] = false;
+        iAttributes[i++] = FALSE;
         break;
     case QSurfaceFormat::DoubleBuffer:
     case QSurfaceFormat::TripleBuffer:
         iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
-        iAttributes[i++] = true;
+        iAttributes[i++] = TRUE;
         break;
     }
     if (format.stereo()) {
         iAttributes[i++] = WGL_STEREO_ARB;
-        iAttributes[i++] = true;
+        iAttributes[i++] = TRUE;
     }
     if (format.depthBufferSize() >= 0) {
         iAttributes[i++] = WGL_DEPTH_BITS_ARB;
@@ -435,13 +435,13 @@ static int choosePixelFormat(HDC hdc,
     int samplesValuePosition = 0;
     if (sampleBuffersRequested) {
         iAttributes[i++] = WGL_SAMPLE_BUFFERS_ARB;
-        iAttributes[i++] = true;
+        iAttributes[i++] = TRUE;
         iAttributes[i++] = WGL_SAMPLES_ARB;
         samplesValuePosition = i;
         iAttributes[i++] = format.samples();
     } else if (samples == 0 || samples == 1 ) {
         iAttributes[i++] = WGL_SAMPLE_BUFFERS_ARB;
-        iAttributes[i++] = false;
+        iAttributes[i++] = FALSE;
     }
     // If sample buffer request cannot be satisfied, reduce request.
     int pixelFormat = 0;
diff --git a/src/plugins/platforms/windows/qwindowskeymapper.cpp b/src/plugins/platforms/windows/qwindowskeymapper.cpp
index 633773de00..044d31e972 100644
--- a/src/plugins/platforms/windows/qwindowskeymapper.cpp
+++ b/src/plugins/platforms/windows/qwindowskeymapper.cpp
@@ -697,7 +697,7 @@ static void showSystemMenu(QWindow* w)
 {
     QWindow *topLevel = QWindowsWindow::topLevelOf(w);
     HWND topLevelHwnd = QWindowsWindow::handleOf(topLevel);
-    HMENU menu = GetSystemMenu(topLevelHwnd, false);
+    HMENU menu = GetSystemMenu(topLevelHwnd, FALSE);
     if (!menu)
         return; // no menu for this window
 
@@ -722,7 +722,7 @@ static void showSystemMenu(QWindow* w)
     closeItem.cbSize = sizeof(MENUITEMINFO);
     closeItem.fMask = MIIM_STATE;
     closeItem.fState = MFS_DEFAULT;
-    SetMenuItemInfo(menu, SC_CLOSE, false, &closeItem);
+    SetMenuItemInfo(menu, SC_CLOSE, FALSE, &closeItem);
 
 #undef enabled
 #undef disabled
diff --git a/src/plugins/platforms/windows/qwindowsscreen.cpp b/src/plugins/platforms/windows/qwindowsscreen.cpp
index 16cd4b49dd..d843236695 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.cpp
+++ b/src/plugins/platforms/windows/qwindowsscreen.cpp
@@ -93,8 +93,8 @@ BOOL QT_WIN_CALLBACK monitorEnumCallback(HMONITOR hMonitor, HDC, LPRECT, LPARAM
     MONITORINFOEX info;
     memset(&info, 0, sizeof(MONITORINFOEX));
     info.cbSize = sizeof(MONITORINFOEX);
-    if (GetMonitorInfo(hMonitor, &info) == false)
-        return true;
+    if (GetMonitorInfo(hMonitor, &info) == FALSE)
+        return TRUE;
 
     WindowsScreenDataList *result = reinterpret_cast<WindowsScreenDataList *>(p);
     QWindowsScreenData data;
@@ -131,7 +131,7 @@ BOOL QT_WIN_CALLBACK monitorEnumCallback(HMONITOR hMonitor, HDC, LPRECT, LPARAM
         data.flags |= QWindowsScreenData::PrimaryScreen;
     data.name = QString::fromWCharArray(info.szDevice);
     result->append(data);
-    return true;
+    return TRUE;
 }
 
 static inline WindowsScreenDataList monitorData()
diff --git a/src/plugins/platforms/windows/qwindowsservices.cpp b/src/plugins/platforms/windows/qwindowsservices.cpp
index f06c7f2655..a2688a1d61 100644
--- a/src/plugins/platforms/windows/qwindowsservices.cpp
+++ b/src/plugins/platforms/windows/qwindowsservices.cpp
@@ -138,7 +138,7 @@ static inline bool launchMail(const QUrl &url)
     STARTUPINFO si;
     ZeroMemory(&si, sizeof(si));
     si.cb = sizeof(si);
-    if (!CreateProcess(NULL, (wchar_t*)command.utf16(), NULL, NULL, false, 0, NULL, NULL, &si, &pi)) {
+    if (!CreateProcess(NULL, (wchar_t*)command.utf16(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) {
         qErrnoWarning("Unable to launch '%s'", qPrintable(command));
         return false;
     }
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 7ffd0de58c..b43032dc1a 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -511,7 +511,7 @@ void WindowCreationData::initialize(HWND hwnd, bool frameChange, qreal opacityLe
             SetWindowPos(hwnd, HWND_BOTTOM, 0, 0, 0, 0, swpFlags);
         }
         if (flags & (Qt::CustomizeWindowHint|Qt::WindowTitleHint)) {
-            HMENU systemMenu = GetSystemMenu(hwnd, false);
+            HMENU systemMenu = GetSystemMenu(hwnd, FALSE);
             if (flags & Qt::WindowCloseButtonHint)
                 EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_ENABLED);
             else
@@ -557,7 +557,7 @@ QMargins QWindowsGeometryHint::frame(DWORD style, DWORD exStyle)
 #ifndef Q_OS_WINCE
     style &= ~(WS_OVERLAPPED); // Not permitted, see docs.
 #endif
-    if (!AdjustWindowRectEx(&rect, style, false, exStyle))
+    if (!AdjustWindowRectEx(&rect, style, FALSE, exStyle))
         qErrnoWarning("%s: AdjustWindowRectEx failed", __FUNCTION__);
     const QMargins result(qAbs(rect.left), qAbs(rect.top),
                           qAbs(rect.right), qAbs(rect.bottom));
@@ -869,7 +869,7 @@ void QWindowsWindow::show_sys() const
             // maximizing the widget, and then remove the maximize button afterwards.
             if (flags & Qt::WindowTitleHint &&
                 !(flags & (Qt::WindowMinMaxButtonsHint | Qt::FramelessWindowHint))) {
-                fakedMaximize = true;
+                fakedMaximize = TRUE;
                 setStyle(style() | WS_MAXIMIZEBOX);
             }
         }
@@ -1107,7 +1107,7 @@ bool QWindowsWindow::handleWmPaint(HWND hwnd, UINT message,
                                          WPARAM, LPARAM)
 {
     // Ignore invalid update bounding rectangles
-    if (!GetUpdateRect(m_data.hwnd, 0, false))
+    if (!GetUpdateRect(m_data.hwnd, 0, FALSE))
         return false;
     if (message == WM_ERASEBKGND) // Backing store - ignored.
         return true;
@@ -1537,7 +1537,7 @@ static inline DWORD cornerToWinOrientation(Qt::Corner corner)
 
 bool QWindowsWindow::startSystemResize(const QPoint &, Qt::Corner corner)
 {
-    if (!GetSystemMenu(m_data.hwnd, false))
+    if (!GetSystemMenu(m_data.hwnd, FALSE))
         return false;
 
     ReleaseCapture();
diff --git a/src/winmain/qtmain_win.cpp b/src/winmain/qtmain_win.cpp
index 845166f595..fc3828d4ac 100644
--- a/src/winmain/qtmain_win.cpp
+++ b/src/winmain/qtmain_win.cpp
@@ -109,7 +109,7 @@ int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPSTR /*cmdPara
 
     // If there exists an other instance of this application
     // it will be the owner of a mutex with the unique ID.
-    HANDLE mutex = CreateMutex(NULL, true, (LPCWSTR)uid.utf16());
+    HANDLE mutex = CreateMutex(NULL, TRUE, (LPCWSTR)uid.utf16());
     if (mutex && ERROR_ALREADY_EXISTS == GetLastError()) {
         CloseHandle(mutex);