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Microsoft Research Detours - Detours is a software package for re-routing Win32 APIs underneath applications.
EasyHook - The reinvention of Windows API Hooking
API Monitor - API Monitor is a software that monitors and displays API calls made by applications and services. Its a powerful tool for seeing how Windows and other applications work or tracking down problems that you have in your own applications
Postman - The Collaboration Platform for API Development
WinAPIOverride - WinAPIOverride : This software allows you to monitor and/or modify any function of a process for any calling convention (stdcall or cdecl)
Code Project - Developers' community