Lets say i have 10 Business Objects which i declare in ApplicationBasePage and then i inherit all my pages from ApplicationBasePage, so on load of all pages are ALL the 10 Business Objects loaded & populated or only the selective ones are loaded ?

Basically, on a Item Details page i would not like to load the CustomerBO to have less amount of processing.

Request you to please elobarate a bit on this concept and clarify my concern.

Your approach for your base class should work just fine.  One option that we use from time to time is a shared class in cases that we need to re-use code from several locations and subclassing is not really an option.  In your case you can subclass, but just to show you another option, you can create a shared class that never requires an instance to be created and you can call directly anytime:

Public Notinheritable Class MySharedClass

'-- Prevent the class from being instantiated
Private Sub New()
End Sub

'-- A shared sub
Public Shared Sub MySharedMethod()
    '-- Do whatever you need to do
End SUb

'-- A shared function
Public Shared Function MySharedFunction() As Boolean
    '-- Do some stuff
    Return True
End Sub

End Class

As for the DLLs required, you will need the following:

MicroFour StrataFrame Base.DLL
MicroFour StrataFrame Business.DLL
MicroFour StrataFrame UI.DLL

and if you are using security you will need:

MicroFour StrataFrame Security.DLL