The OnStartPage method is invoked as a call-back method by the ASP scripting context when an instance of the VerifUsr class is created via the intrinsic Server object method CreateObject. One need not explicitly call this method.
The method gathers the necessary interfaces internally to prepare for additional method invocations.
Example
VBScript in an ASP page
Set IVerifUsr = Server.CreateObject("Membership.Verifusr.1")
Here the OnStartPage method is invoked automatically by the ASP scripting context.