Determine path to registry key from HKEY handle in C++

Question

Given a handle to a Windows Registry Key, such as the ones that are set by ::RegOpenKeyEx(), is it possible to determine the full path to that key?

I realize that in

Answer 1

You can use RegSaveKey and write it to a file, then look at the file.

Alternatively you can keep a global map of HKEYs to LPCWSTRs and add entries when you open them and do lookups whenever.

You may also be able to do something with the !reg command in WinDBG / NTSD, but you can't just give it the HKEY. You'll have to do some other trickery to get the info you want out of it.