You can lock an application with the "Lock" method. When an application is locked, the users cannot change the Application variables (other than the one currently accessing it). You can unlock an application with the "Unlock" method. This method removes the lock from the Application variable:
<%
Application.Lock
'do some application object operations
Application.Unlock
%>
Application.Lock
'do some application object operations
Application.Unlock
%>
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