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diff --git a/src/quickdialogs/quickdialogs/qquickmessagedialog_p.h b/src/quickdialogs/quickdialogs/qquickmessagedialog_p.h
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index 0000000000..ea0b2bbae2
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+++ b/src/quickdialogs/quickdialogs/qquickmessagedialog_p.h
@@ -0,0 +1,75 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QQUICKMESSAGEDIALOG_P_H
+#define QQUICKMESSAGEDIALOG_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qquickabstractdialog_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class Q_QUICKDIALOGS2_EXPORT QQuickMessageDialog : public QQuickAbstractDialog
+{
+    Q_OBJECT
+
+private:
+    Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged FINAL)
+    Q_PROPERTY(QString informativeText READ informativeText WRITE setInformativeText NOTIFY informativeTextChanged FINAL)
+    Q_PROPERTY(QString detailedText READ detailedText WRITE setDetailedText NOTIFY detailedTextChanged FINAL)
+    Q_PROPERTY(QPlatformDialogHelper::StandardButtons buttons READ buttons WRITE setButtons NOTIFY buttonsChanged FINAL)
+    QML_EXTENDED_NAMESPACE(QPlatformDialogHelper)
+    QML_NAMED_ELEMENT(MessageDialog)
+    QML_ADDED_IN_VERSION(6, 3)
+
+public:
+    explicit QQuickMessageDialog(QObject *parent = nullptr);
+
+    QString text() const;
+    void setText(const QString &text);
+
+    QString informativeText() const;
+    void setInformativeText(const QString &text);
+
+    QString detailedText() const;
+    void setDetailedText(const QString &text);
+
+    QPlatformDialogHelper::StandardButtons buttons() const;
+    void setButtons(QPlatformDialogHelper::StandardButtons buttons);
+
+Q_SIGNALS:
+    void textChanged();
+    void informativeTextChanged();
+    void detailedTextChanged();
+    void buttonsChanged();
+
+    void buttonClicked(QPlatformDialogHelper::StandardButton button,
+                       QPlatformDialogHelper::ButtonRole role);
+
+private Q_SLOTS:
+    void handleClick(QPlatformDialogHelper::StandardButton button,
+                     QPlatformDialogHelper::ButtonRole role);
+
+protected:
+    void onCreate(QPlatformDialogHelper *dialog) override;
+    void onShow(QPlatformDialogHelper *dialog) override;
+    int dialogCode() const override;
+
+private:
+    QSharedPointer<QMessageDialogOptions> m_options;
+    QPlatformDialogHelper::ButtonRole m_roleOfLastButtonPressed = QPlatformDialogHelper::NoRole;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQUICKMESSAGEDIALOG_P_H