How to get default symbol cache directory for WinDbg from my extension?

WINDBG
1

I'm trying to figure out how to pull out a path to a default symbol cache directory that WinDbg uses?

I tried to use IDebugSymbols3::GetSymbolPathWide method:

WCHAR buff[1024];
ULONG used = 0;
pDebugSymbols->GetSymbolPathWide(buff, _countof(buff), &used);

but it just gives me srv*. When the actual path for the symbols cache is: %PROGRAMDATA%\Dbg\Sym which is C:\ProgramData\dbg\sym in my case.