How to get Program Files folder path (not Program Files (x86)) from 32bit WOW process?

Question

I need to get the path to the native (rather than the WOW) program files directory from a 32bit WOW process.

When I pass CSIDL_PROGRAM_FILES (or CSIDL_PROGRAM_FILESX86)

Answer 1

I appreciate all the help and, especially, the warnings in this thread. However, I really do need this path and this is how I got it in the end:

(error checking removed for clarity, use at your own risk, etc)

WCHAR szNativeProgramFilesFolder[MAX_PATH];
ExpandEnvironmentStrings(L"%ProgramW6432%", 
                       szNativeProgramFilesFolder, 
                       ARRAYSIZE(szNativeProgramFilesFolder);