How to pass data from MVC Controller to ASPX Page?

Question

I have two projects (one ASP.NET MVC and one ASP.NET Webform). I am showing the aspx page of webform project in one panel of the cshtml page of MVC project.

I wanted to pass a value from the action method of controller to the aspx page and I need to use it in the webform project. Could some one help how to achieve this?

Thanks in advance!