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Appdomain - 'Cannot pass GC Handle'

Posted By:      Posted Date: September 10, 2010    Points: 0   Category :.NET Framework
 
Hi,  I have an activex control loaded in IE; This activex control contains legacy MFC/C++ controls and C# WPF controls; Everything seems to be working if I click on the WPF control; but if I click on the MFC control which in turn refreshes the WPF, IE crashes abruptly. Looks like, there are two appdomains - one created for the webapp (loading activex control) and another is of IE's default appdomain.  If I click on the WPF control, call starts from the webapp's appdomain - no issues but if I click on the MFC control, call starts from the IE's default appdomain and crashes when it enters the webapp's appdomain to access the WPF control. What could be the solution? I did not like the marshalling concepts of delegate-to-function pointer. I cannot change the architecture as well, it is more than a decade old. Same control seems to be working fine in other containers, it is just that it is not working in IE. Any help will be greatly appreciated.   - Venkatesh


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