EasyHook makes it possible to extend (via hooking) unmanaged code APIs with pure managed functions, from within a fully managed environment on 32- or 64-bit Windows XP SP2, Windows Vista x64, Windows Server 2008 x64, Windows 7, Windows 8.1, and Windows 10.
Microsoft Research Detours v3 Professional is a library for instrumenting arbitrary Win32 functions on x86, x64, and IA64 machines. Now you can intercept Win32 functions by re-writing the in-memory code for target functions.
"madCodeHook" offers everything you need to hook code (mostly APIs). Supports Delphi 4-7, Delphi 2005-10.1 Berlin (32bit and 64bit), Borland C++ Builder 5-6, Borland C++ Builder 2006-10.1 Berlin (32bit only for now), MSVC++ (32bit and 64bit).