How to figure out the user name I am using with GetObject call

[Gang Yang]

How could I figure out what is the user name I am using for credential when using GetObject method in ADSI,

Set domain = GetObject(sBind)
' get all the user names
listUsers.Clear

domain.Filter = Array("user")
For Each user In domain
listUsers.AddItem user.Name
Next

I need this client information for further security integration...

Thanks
Gang