Application.Lock() from whitin custom class

[P. Prosper]

I need some help on this issue. I am trying to lock the application object
from within a vb class but I'll get the following error:

Exception Details: System.NullReferenceException: Object reference not set
to an instance of an object.

Source Error:

Line 84: Dim i As Integer
Line 85: Dim TmpSockets(5) As String
Line 86: application.Lock()
Line 87: TmpSockets = application("sockets")
Line 88: For i = 1 To 5

Source File: C:\Inetpub\wwwroot\webapp\TCPPipe.vb Line: 86

In the declarations of my class I have:
Public Class TCPPipe

Inherits System.Web.HttpApplication

Any help / suggestion will be greatly appreciated.

PS : I'm using VS.NET 2003

 

[P. Prosper]

I finally solved the issue. In the class I inserted
Dim AppState As HttpApplicationState = HttpContext.Current.Application

then used AppSate.Lock()