.WithDialogOnComplete() Customization

Hello! I am attempting to customize the message that is displayed in the OnDialogComplete box that is shown to a user once they're finished signing. I see in this post: https://developer.esignlive.com/forums/topic/completed-signing-message/ support says it's possible, but gives no examples. In developer posts like this: http://docs.esignlive.com/content/c_integrator_s_guide/sdk/k_customization/customizing_the_signing_cermony.htm it again says it's possible, and gives an example on how to *get* the current message, but no examples on how to set the message. So my question: how do I set the on complete dialog message content, title, and logo with the .NET SDK on a per-package basis? Thanks