Pass what login & pwd to LL_SessionAlloc() if using NTLM Authentication?

Richard_Ma_(mtrcadmin_-_(deleted))

I am using VB6 and want to write a little program accessing the livelink resources. We are using Livelink "Single Sign-on" feature where NT users have no need to re-enter username and pwd when connecting to livelink (NTLM Authentication).So, what values should I assigned for the username and password when I want to create a Session with livelink by LL_SessionAlloc()??? Or are there any other ways to achieve this? Can anybody provide some source code for reference?Thank you very much