Windows minimize and maximize event for Creo Parametric

1. Describe your environment: What is your industry? What is your role in your organization? Describe your stakeholders.

We are working with Creo Parametric 7.0.9.0.  We are giving protection to CAD files using Microsoft MIP. I am Technical Lead for our Add-on for Creo. 

We could not be able to get Windows minimize and maximize event for Creo Parametric. We tried with ProToolkit as well OTK C++.