diff -r 000000000000 -r 1918ee327afb src/winmain/qtmain_win.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/winmain/qtmain_win.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,136 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Windows main function of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qt_windows.h"
+#include "qbytearray.h"
+#include "qstring.h"
+#include "qvector.h"
+
+/*
+  This file contains the code in the qtmain library for Windows.
+  qtmain contains the Windows startup code and is required for
+  linking to the Qt DLL.
+
+  When a Windows application starts, the WinMain function is
+  invoked. WinMain calls qWinMain in the Qt DLL/library, which
+  initializes Qt.
+*/
+
+QT_BEGIN_NAMESPACE
+
+#if defined(Q_OS_WINCE)
+extern void __cdecl qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
+#else
+extern void qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
+#endif
+
+QT_END_NAMESPACE
+
+QT_USE_NAMESPACE
+
+
+#if defined(QT_NEEDS_QMAIN)
+int qMain(int, char **);
+#define main qMain
+#else
+#ifdef Q_OS_WINCE
+extern "C" int __cdecl main(int, char **);
+#else
+extern "C" int main(int, char **);
+#endif
+#endif
+
+/*
+  WinMain() - Initializes Windows and calls user's startup function main().
+  NOTE: WinMain() won't be called if the application was linked as a "console"
+  application.
+*/
+
+#ifdef Q_OS_WINCE
+int WINAPI WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPWSTR /*wCmdParam*/, int cmdShow)
+#else
+extern "C"
+int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPSTR /*cmdParamarg*/, int cmdShow)
+#endif
+{
+    QByteArray cmdParam = QString::fromWCharArray(GetCommandLine()).toLocal8Bit();
+
+#if defined(Q_OS_WINCE)
+    wchar_t appName[MAX_PATH];
+    GetModuleFileName(0, appName, MAX_PATH);
+    cmdParam.prepend(QString(QLatin1String("\"%1\" ")).arg(QString::fromWCharArray(appName)).toLocal8Bit());
+#endif
+
+    int argc = 0;
+    QVector<char *> argv(8);
+    qWinMain(instance, prevInstance, cmdParam.data(), cmdShow, argc, argv);
+
+#if defined(Q_OS_WINCE)
+    wchar_t uniqueAppID[MAX_PATH];
+    GetModuleFileName(0, uniqueAppID, MAX_PATH);
+    QString uid = QString::fromWCharArray(uniqueAppID).toLower().replace(QLatin1String("\\"), QLatin1String("_"));
+
+    // 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());
+    if (mutex && ERROR_ALREADY_EXISTS == GetLastError()) {
+        CloseHandle(mutex);
+
+        // The app is already running, so we use the unique
+        // ID to create a unique messageNo, which is used
+        // as the registered class name for the windows
+        // created. Set the first instance's window to the
+        // foreground, else just terminate.
+        // Use bitwise 0x01 OR to reactivate window state if
+        // it was hidden
+        UINT msgNo = RegisterWindowMessage((LPCWSTR)uid.utf16());
+        HWND aHwnd = FindWindow((LPCWSTR)QString::number(msgNo).utf16(), 0);
+        if (aHwnd)
+            SetForegroundWindow((HWND)(((ULONG)aHwnd) | 0x01));
+        return 0;
+    }
+#endif // Q_OS_WINCE
+
+    int result = main(argc, argv.data());
+#if defined(Q_OS_WINCE)
+    CloseHandle(mutex);
+#endif
+    return result;
+}