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diff --git a/libs/usvfs/src/tinjectlib/injectlib.h b/libs/usvfs/src/tinjectlib/injectlib.h
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+/*
+Userspace Virtual Filesystem
+
+Copyright (C) 2015 Sebastian Herbord. All rights reserved.
+
+This file is part of usvfs.
+
+usvfs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+usvfs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with usvfs. If not, see <http://www.gnu.org/licenses/>.
+*/
+#pragma once
+
+#include <windows_sane.h>
+
+namespace InjectLib
+{
+
+/**
+ * @brief inject a dll into the target process
+ * @param processHandle handle of the process to inject to
+ * @param threadHandle handle of the main thread in the process
+ * @param dllname name/path of the dll to inject. The path can't be longer than MAX_PATH
+ * characters
+ * @param initFunction name of the initialization function. Can't be longer than 20
+ * characters. If this is null, no function is called. Important: the init function has
+ * to exist, be exported, take the two userdata parameters and must be __cdecl calling
+ * convention on 32bit windows! Failing any of these the target process will crash or
+ * the dll isn't loaded Why __cdecl? Because otherwise we would need .def files to
+ * export the init function with a GetProcAddress-able function name.
+ * @param userData data passed to the init function
+ * @param userDataSize size of the data to be passed
+ * @param skipInit skip the call to the init function if the named function wasn't found
+ * in the dll. If false, the target process will crash if the function isn't exported in
+ * the dll
+ */
+void InjectDLL(HANDLE processHandle, HANDLE threadHandle, LPCWSTR dllName,
+               LPCSTR initFunction = nullptr, LPCVOID userData = nullptr,
+               size_t userDataSize = 0, bool skipInit = false);
+
+}  // namespace InjectLib