John R. Durant - MSFT
You can use third-party components, chart and reporting controls, etc. with VSTO SE or VSTO 2005. I am not sure what you mean by "transferring" the license. Most third-party vendors provide their own guidance for installing, distributing, and licensing their product. the VSTO tools are agnostic in these matters. For example, many vendors provide an MSI to install their control or component. You can add that MSI to the setup routines for your add-in. If there are licensing requirements that inform that installation and running of the control, the vendor provides that guidance.
Here are more Outlook resources to assist you:
http://blogs.msdn.com/johnrdurant/archive/2005/12/07/vsto_outlook_resourcelist.aspx
Best,
jrd