In my project we are using CWinFormsControl template class to show up .net form in MFC . We found that GDI handle count is increasing as the .net form is not disposing properly. From internet got an idea that many of them are facing the same issue. They suggested the following option. "One way could be dynamically allocating/deallocating (new/delete) m_myUserControl. Still you have to explicitly call System::GC::Collect."
I tried this also. But still facing the same issue. As per the above suggestion we called delete for m_myUserControl in destructor of C++ class where we created CWinFormControl template class object. This delete call didn't call dispose in m_myUserControl. If you suggest the method to dispose the form it will really help me a lot. Thanks in advance.