This simple script added in the PostOpen event of the Database Script will
check if the Notes client is R5, and alert any non-R5 clients that they cannot
properly access the application.
Sub Postopen(Source As Notesuidatabase)
Set session = New NotesSession
Dim version As String
Dim extract As String
version = session.NotesVersion
extract = Left(version, 9)
If extract <> "Release 5" Then
Messagebox "Important: Sorry but you do not have an R5 client and will be
unable to properly access this application.", 0 + 64, "Sorry!"