c# - setnamedsecurityinfo 在 Win7 x64 上运行良好，在 Win7 x86 上失败

Question

以下方法在 Win7 Pro SP1 x64 上运行良好，但是当我在 Win7 Pro SP1 x86 上运行它时，它在到达 //write the new owner 注释时失败

为什么它适用于一个而不适用于另一个的一些原因是什么？

这是使用 pinvoke

谢谢！

public static void ChangeOwner(ref string strPath, string strUserName)
    {
        IntPtr pNewOwner = default(IntPtr);
        IntPtr deUse = default(IntPtr);
        Win32Exception Win32Error = default(Win32Exception);
        string domain_name = null;
        int ret = 0;
        int sid_len = 0;
        int domain_len = 0;

        // Series of quick sanity checks before we proceed...

        //Do we have the required Privilege?
        if (SetPrivileges() == false)
        {
            throw new Exception("Required privilege not held by the user");
        }

        // Convert the name to a valid SID
        sid_len = SID_SIZE;
        pNewOwner = Marshal.AllocHGlobal(sid_len);
        domain_len = NAME_SIZE;
        string domainThing = "";
        domain_name = domainThing.PadRight(domain_len);
        if (LookupAccountName(null, strUserName, pNewOwner, ref sid_len, domain_name, ref domain_len, ref deUse) == false)
        {
            ret = Marshal.GetLastWin32Error();
            Win32Error = new Win32Exception(ret);
            //throw new Exception(Win32Error.Message);
        }

        // write the new Owner
        ret = SetNamedSecurityInfo(strPath, SE_FILE_OBJECT, OWNER_SECURITY_INFORMATION, pNewOwner, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
        if (ret != 0)
        {
            Win32Error = new Win32Exception(ret);
            throw new Exception(Win32Error.Message);
        }

        // clean up and go home
        Marshal.FreeHGlobal(pNewOwner);
    }