In this article, I will talk about the theories and implementations of API hooking. API hooking is a powerful technique that allows someone to hijack a function and redirect it to a custom one. Anything can be done in these functions before passing control back to the original API. Download source code - 44.5 KB Contents Introduction Getting Started: Traditional API Hooking Detours API Hooking 3.1

Detours is a software package for re-routing Win32 APIs underneath applications. For almost twenty years, has been licensed by hundreds of ISVs and used by nearly every product team at Microsoft. What’s New? Detours 4.0.1 is now open source under the MIT license. Detours is on GitHub at https://github.com/Microsoft/Detours (opens in new tab). The source code is identical to Build 343 of Detours 3.