Is it possible to determine the working directory of another process?

Question

Given a HANDLE (or ProcessID) to process 'A' is it possible on Win32 for an unrelated process 'B' to determine the current working directory of process 'A' ?

Answer 1

Yes, but it's non-trivial. The only way of which I'm aware is to use CreateRemoteThread to execute GetCurrentDirectory in the context of the target program.

Answer 2

I thought this may be possible using the same technique you can use to get an external processes command line and there does seem to be a _RTL_USER_PROCESS_PARAMETERS->CurrentDirectoryPath which sounds promising.

(The example doesn't state that the APIs are largely undocumented and that they are not future proof, so YMMV)