If I am not mistaken, the url http://www.devx.com/asp/Article/16802/0/page/2 speaks about ASP and ADO (vb 6.0 and com objects) that is not related to this topic.

Anyway, it is better to use locking (Application.lock() and Application.UnLock()) when application variables are accessed. If you use session objects, of course you do not need to worry about it.