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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \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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