VSTA interaction with User controls created in addin's

Hi,

I am trying to create add-in's using VSTA with custom controls and use these inside my main application. What I have understood so far is that UserControls & Forms etc do not marshal across the proxy layer. Is there a way to either avoid using proxy or there exists another method by using IContract?

goyalmayank,
You are correct, you cannot marshal System.Windows.Forms and the like across the proxy layer.  However, we have a WPF sample that you may find helpful showing an alternative way to add UI to the form from an add-in.

Samples:
ExpenseIT UI Extensibility Demo
ExpenseIT VSTA Integration Demo Source from MSDN

I hope this helps, if you have any questions please let me know.
Thanks,
-Melody