How should I pass the SessionID(when I logon, I get the SessionID) from 1
function to another in VB.Net.

I declared g_SessionID globally, then in another function, I take SessionID
as input and use it like this:
queryAssetListXml = "<?xml version='1.0' ?>" & _
                           "<QueryAssetList2
xmlns=""urn:schemas-tms:QueryAssetList2"">" & _
                           "<SessionID>" & g_SessionID & "</SessionID>" & _
                           "</QueryAssetList2>"

But, I notice that even I get the SessionID , SessionID still remains
Null.Any idea?