need help with Exe/DLL issue- menu checking

this may be one of the most ignorant questions ever asked here, but I cannot figure out how to handle this seamingly simple issue-

I have an .exe that contains a form. This form is used as a launcher that contains only menu items for a user to click on(similar to a MIDI). When the user clicks on a menu item, I instantiate a DLL, load a form contained in that DLL, and then check the menu option within the launcher form that the user just clicked.

What I want to do is when I close the form that was called from the launcher, I want to uncheck the menu option.

It sounds simple to me, but I havent come across any way to make a circular reference back to the launcher form(is this what I really want to do?? CR's are bad, or that's what MSDN says).

Any help here will be greatly appreciated!!

Troy