C# 指定父層級目錄

     lstrcatW(pszpath, "\\..\\..\\");
     DWORD dwlen = GetFullPathNameW(pszpath, 0u, null, null);
     void* pv = malloc((size_t)(uint)dwlen);
     GetFullPathNameW(pszpath, dwlen, (char*)pv, null);
     string sz = new string((char*)pv);
     free(pv);