How is call variable set in the video of the screenpop gadget?

Version 1
    This document was generated from CDN thread

    Created by: Absaar Javed on 08-02-2013 04:16:47 AM
    If I want to set the value of a particular callVariable, like shown in screenpop Gadget video callVariable1 is assigned the value "John Doe", how would I be able to do that?

    Subject: RE: New Message from Absaar Javed in Cisco Finesse - General Questions: RE:
    Replied by: David Lender on 08-02-2013 09:03:07 AM
    Set the callvariable value in the ICM script associated with the dialed number.