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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Digia Plc 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,
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
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****************************************************************************/
/*! \page winmigrate-qt-dll-example.html
\title Qt based Application Extension
This examples shows how to use the QWinWidget and QMfcApp classes to
implement a Qt based user interface in a plugin DLL.
\quotefromfile qtdll/main.cpp
The plugin implements and exports a \c C function \c showDialog that
can be called by any Windows application to display a modal Qt dialog.
Before a Qt based user interface can be created a QApplication object
must exist, and the calling application's event loop and the Qt event
loop must run together.
\printto extern "C"
The DLL entry point function \c DllMain uses the QMfcApp::pluginInstance
function to make sure that exactly one instance of QApplication exists
in the process, and that the DLL owning that instance stays loaded in
memory.
\printuntil }
The \c C function \c showDialog is exported from the DLL and uses the
QWinWidget class to provide proper stacking and modality between the
native Win32 window and the QMessageBox.
*/
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