Detours is a library for instrumenting arbitrary Win32 functions on x86, x64, and IA64 machines. Detours intercepts Win32 functions by rewriting the in-memory code for target functions. The Detours package also contains utilities to attach arbitrary DLLs and data segments (called payloads) to any Win32 binary.

Documentation, Code Libraries

Features include:

• Complete documentation of the Detours API
• A transactional model for attaching and detaching detours
• Unification of dynamic and static detours into a single API

Detours 2.1 comes in two editions:

Detours Express 2.1 is available for immediate download under a no-fee, click-through license for research, noncommercial, and nonproduction use on 32-bit code.

Detours Professional 2.1 includes a license for use in production environments and the right to distribute detour functions in products. In addition to support for 32-bit x86 code, Detours Professional 2.1 includes support for 64-bit code on x64 and IA64 processors.