Referring to connection manager from ssis script

The following code throws a null object exception:

<System.AddIn.AddIn("ScriptMain", Version:="1.0", Publisher:="", Description:="")> _
<System.CLSCompliantAttribute(False)> _
Public Class connectionfunctions

    Inherits Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase

    Public Function cogsdaleconnectionstring() As String
        Dim cm As ConnectionManager
        MsgBox("Incon")
        cm = Dts.Connections("Cogsdale")


        msgbox(cm.ToString)


        Return cm.ConnectionString

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I am attempting to access the connection from connection manager from within my script task.
UnderSevenAsked:
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Brian CroweDatabase AdministratorCommented:
try this...

Dim cm As ConnectionManager
Dim cmParam As Wrapper.IDTSConnectionManagerDatabaseParameters90
Dim conn As OleDb.OleDbConnection

cm = Dts.Connections("oledb")
cmParam = CType(cm.InnerObject, Wrapper.IDTSConnectionManagerDatabaseParameters90)
conn = CType(cmParam.GetConnectionForSchema(), OleDb.OleDbConnection)
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UnderSevenAuthor Commented:
The wrapper is undefined, is this specific to 2005? Cause I'm using 2008
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Brian CroweDatabase AdministratorCommented:
Yeah it is 2005...I'll see if I can find a late equivalent.
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UnderSevenAuthor Commented:
Technically this answers the question even if it wasn't the version I Wanted, I hadn't specified.
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Microsoft SQL Server 2008

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