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diff --git a/include/vcl/mnemonic.hxx b/include/vcl/mnemonic.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_MNEMONIC_HXX
+#define INCLUDED_VCL_MNEMONIC_HXX
+
+#include <com/sun/star/uno/Reference.h>
+#include <rtl/ustring.hxx>
+#include <vcl/dllapi.h>
+
+namespace com::sun::star::i18n { class XCharacterClassification; }
+
+// Mnemonic Chars, which we want support
+// Latin 0-9
+#define MNEMONIC_RANGE_1_START      0x30
+#define MNEMONIC_RANGE_1_END        0x39
+// Latin a-z
+#define MNEMONIC_RANGE_2_START      0x61
+#define MNEMONIC_RANGE_2_END        0x7A
+// Cyrillic
+#define MNEMONIC_RANGE_3_START      0x0430
+#define MNEMONIC_RANGE_3_END        0x044F
+// Greek
+#define MNEMONIC_RANGE_4_START      0x03B1
+#define MNEMONIC_RANGE_4_END        0x03CB
+#define MNEMONIC_RANGES             4
+#define MAX_MNEMONICS               ((MNEMONIC_RANGE_1_END-MNEMONIC_RANGE_1_START+1)+\
+                                     (MNEMONIC_RANGE_2_END-MNEMONIC_RANGE_2_START+1)+\
+                                     (MNEMONIC_RANGE_3_END-MNEMONIC_RANGE_3_START+1)+\
+                                     (MNEMONIC_RANGE_4_END-MNEMONIC_RANGE_4_START+1))
+
+#define MNEMONIC_CHAR               u'~'
+#define MNEMONIC_INDEX_NOTFOUND     (sal_uInt16(0xFFFF))
+
+
+class VCL_DLLPUBLIC MnemonicGenerator
+{
+    sal_Unicode m_cMnemonic;
+    // 0 == Mnemonic; >0 == count of characters
+    sal_uInt8               maMnemonics[MAX_MNEMONICS];
+    css::uno::Reference< css::i18n::XCharacterClassification > mxCharClass;
+
+    SAL_DLLPRIVATE static sal_uInt16 ImplGetMnemonicIndex( sal_Unicode c );
+    SAL_DLLPRIVATE sal_Unicode ImplFindMnemonic( const OUString& rKey );
+
+public:
+                        MnemonicGenerator(sal_Unicode cMnemonic = MNEMONIC_CHAR);
+
+    void                RegisterMnemonic( const OUString& rKey );
+    [[nodiscard]] OUString CreateMnemonic(const OUString& rKey);
+    css::uno::Reference< css::i18n::XCharacterClassification > const & GetCharClass();
+
+    // returns a string where all '~'-characters and CJK mnemonics of the form (~A) are completely removed
+    static OUString EraseAllMnemonicChars( const OUString& rStr );
+};
+
+#endif // INCLUDED_VCL_MNEMONIC_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */