How to create the crystal report viewer control at runtime

What exactly are you trying to do? I am not sure if you can do that. When you drop a crystal report viewer control to a page, the designer adds reference to the control something like this:

<%@ Register TagPrefix="cr" Namespace="CrystalDecisions.Web" Assembly="CrystalDecisions.Web, Version=10.0.3300.0, Culture=neutral, PublicKeyToken=23424234234" %>

<%@ Register TagPrefix="cr" Namespace="CrystalDecisions.Web" Assembly="CrystalDecisions.Web, Version=10.0.3300.0, Culture=neutral, PublicKeyToken=692fbea5521e1304" %>