The following is the copyright notice for Detours

DISCLAIMER AND LICENSE:
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The entire Detours package is covered by copyright law.
Copyright (c) Microsoft Corporation.  All rights reserved.
Portions may be covered by patents owned by Microsoft Corporation.

Usage of the Detours package is covered under the End User License Agreement.
Your usage of Detours implies your acceptance of the End User License Agreement.

If you distribute programs which use Detours, you must also distribute a
copy of DETOURED.DLL, which is required for your program to execute.
DETOURED.DLL is built when you build the libraries.

A complete list of redistributable files is in REDIST.TXT.