VB.Net: Capture native form open or close event via Microstation Add-in

Hello,

I've written an Addin (or I should say using modified Addin Jan Slegr had written...very nice, by the way) and I'm wondering if there is some way I can capture load and unload events of native forms or forms from other Addins? I wrote a plug in for Promis.e and was able to add form opening and closing event using the eventcenter in their ECT.ECAD.API dll and I was wondering if there was some equivalent in the Bentley.MicroStation.AddIn Namespace?

Thanks Dave