EasyHook is described as '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' and is an app in the Development category. There are three alternatives to EasyHook for Windows. The best alternative is Deviare API Hook, which is both free and Open Source. Other great apps like EasyHook are Microsoft Research Detours (Paid) and madCodeHook (Paid).
Deviare is a powerful Code Interception Library, with a very simple interface that lets you hook many processes on your own application without any IPC coding. It can be used in any COM supporting languages as C++, VB and .NET.
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).