>>Any added property would only be available during the session that called the AddProperty
>
>Yes, I understand this. But they aren't available in CURRENT session outside the DLL
>
>For example :
>
>TestDll Method MyAddProperty
>This.AddProperty("NewProperty1")
>This.AddProperty("NewProperty2")
>
>TestDll Method TestNewProperty
>This.Newproperty1 = "Test"
>This.NewProperty2=This.NewProperty1
>
>VB Code
>Dim MyTestDLL as New TestDLL
>.....
>MyTestDll.MyAddProperty 'Ok
>MyTestDll.TestNewProperty 'Ok
>MyTestDll.NewProperty1 = "???" ' Error

I believe this is by design. The AddProperty would only be available during the method call that called it.