Hook Windows registry (systemically) and encrypt/decrypt data

This is for a Win32 C++ Console Application and very likely an additional DLL. Use Visual Studio 13, 19, or 22. I need to hook access to the windows registry for all running applications (not just this console app). Here is the purpose of the project. It is to support a security paper that talks about encrypting registry data that is saved and unencrypting it once it is retrieved. The pipeline is this: 1. Hook the registry 2. Watch reads and writes to keys that are in a list (I would suggest 3-4 keys in a list for testing) struct MonitorKey { HKEY key; TCHAR name[256]; }; struct MonitorKey mk[] = { {HKEY_LOCAL_MACHINE, L"This\\Key\\Name" }, {HKEY_CURRENT_USER, L"That\\Key\\Name" } }; 3. When an application writes to a key that is in the list, the data in encrypted and then written. 4. When an application reads from a key in the list, the data in unencrypted and then returned. 5. It will be convenient if there is a leading single character that indicates if data is encrypted with this software . It might be possible that a key in the list has remaining data (from before this registry hooking began) that is unencrypted and trying to unencrypted will lead to an error. 6. The console app should contain the encryption key. 7. From what I have read you may need to write a separate DLL so that you can hook the entire system. I am not sure about this, but a console app may only be able to hook calls from itself.