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diff --git a/desktop/win32/source/loader.hxx b/desktop/win32/source/loader.hxx
new file mode 100644
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+++ b/desktop/win32/source/loader.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_DESKTOP_WIN32_SOURCE_LOADER_HXX
+#define INCLUDED_DESKTOP_WIN32_SOURCE_LOADER_HXX
+
+#include <cstddef>
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <string.h>
+
+#define MY_LENGTH(s) (sizeof (s) / sizeof *(s) - 1)
+#define MY_STRING(s) (s), MY_LENGTH(s)
+
+namespace desktop_win32 {
+
+inline WCHAR * commandLineAppend(
+    WCHAR * buffer, WCHAR const * text, std::size_t length)
+{
+    wcsncpy(buffer, text, length + 1); // trailing null
+    return buffer + length;
+}
+
+inline WCHAR * commandLineAppend(WCHAR * buffer, WCHAR const * text) {
+    return commandLineAppend(buffer, text, wcslen(text));
+}
+
+inline WCHAR * commandLineAppendEncoded(WCHAR * buffer, WCHAR const * text) {
+    std::size_t n = 0;
+    for (;;) {
+        WCHAR c = *text++;
+        if (c == L'\0') {
+            break;
+        } else if (c == L'$') {
+            buffer = commandLineAppend(buffer, MY_STRING(L"\\$"));
+            n = 0;
+        } else if (c == L'\\') {
+            buffer = commandLineAppend(buffer, MY_STRING(L"\\\\"));
+            n += 2;
+        } else {
+            *buffer++ = c;
+            n = 0;
+        }
+    }
+    // The command line will continue with a double quote, so double any
+    // preceding backslashes as required by Windows:
+    for (std::size_t i = 0; i < n; ++i) {
+        *buffer++ = L'\\';
+    }
+    *buffer = L'\0';
+    return buffer;
+}
+
+// Set the PATH environment variable in the current (loader) process, so that a
+// following CreateProcess has the necessary environment:
+// @param binPath
+// Must point to an array of size at least MAX_PATH.  Is filled with the null
+// terminated full path to the "bin" file corresponding to the current
+// executable.
+// @param iniDirectory
+// Must point to an array of size at least MAX_PATH.  Is filled with the null
+// terminated full directory path (ending in "\") to the "ini" file
+// corresponding to the current executable.
+void extendLoaderEnvironment(WCHAR * binPath, WCHAR * iniDirectory);
+
+// Implementation of the process guarding soffice.bin
+int officeloader_impl(bool bAllowConsole);
+
+// Implementation of the process guarding unopkg.bin
+int unopkgloader_impl(bool bAllowConsole);
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */