How to read ActiveX Checkbox Value using C# Word automation?

I am using C# word automation to read through a form created using Microsoft Word.  The form contains ActiveX checkbox controls.  I am a bit clueless on how to check these fields and have searched high and low for sample code but have come up empty.

Could someone point me in the right direction?  Say I have an ActiveX checkbox (called "Check1") in a word form, what kind of code do I need to test if it is checked or not?

Thanks in advance,

Scott Lee