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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \page winmigrate-qt-in-win32-example.html
\title Qt widgets in Win32
This examples shows how to use the QWinWidget class to use Qt widgets
inside a native Win32 user interface.
\quotefromfile winwidget/main.cpp
\skipto WndProc
The Window procedure for the native Win32 window implements a message
handlers for left and right mouse button clicks.
\printto WM_RBUTTONUP
When the left button is clicked a modal message box is opened. The
QWinWidget class is used to provide a bridge between the Win32 window
and the QMessageBox, and ensures that the Win32 window is modally
blocked by the message box.
\printto WM_KEYDOWN
When the right button is clicked a modeless message box is opened.
The QWinWidget class is used again to provide proper placement and
stacking of the message box. Note that this time both the QWinWidget
and the QMessageBox are created on the heap using operator new. Since
the \c WDestructiveClose flag is passed to the QMessageBox constructor
it is however not necessary to delete either of those objects.
\printto return 0;
\printuntil }
When the Win32 window is closed the application is terminated. Unhandled
messages are processed by the default window procedure.
\printto int argc
The application's entry point function \c wWinMain registers a window
class and creates a window using the CreateWindow API. Note that the
UNICODE versions of all Win32 APIs are used.
\printuntil QApplication
Before the Qt based user interface can be created a QApplication object
must exist. The translation of the command line arguments is omitted
for brevity.
\printuntil win.move
The QWinWidget class is once again used as a bridge between the Win32
window and a Qt widget, QPushButton this time.
Since the QWinWidget is a proper QWidget it can be layouted and
positioned like any other QWidget.
\printuntil }
Finally the Win32 user interface is displayed, and control is passed to
the QApplication event loop. Since Windows doesn't show child windows
recoursively the Qt widget has to be shown explicitly.
*/
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